Standard Specifications for Improvements
Section II. Streets
All street pavements shall be constructed in accordance with the design criteria for the various classes as established in the “Bureau of Design and Environment Manual” and “Highway Standards” of the State of Illinois Department of Transportation, latest edition. Construction materials and methods shall meet the requirements of the “Standard Specifications for Road and Bridge Construction”, latest edition. The thickness of the pavements for Major Collectors and Arterials shall be determined in accordance with the current Illinois Department of Transportation “Manual For Structural Design of Portland Cement Concrete Pavement” and the “Manual of Instructions For The Structural Design Of Bituminous Concrete Pavements”.
Streets shall not be constructed on a subgrade having an Illinois Bearing Ratio (I.B.R.) of less than 3.0. If the Soils Report indicates that the support value of the subgrade has a minimum I.B.R. value less than 3.5, or a silt content equal to or greater than ten percent (10%), then an approved non-woven pavement fabric shall be used, along with an open-graded granular base and under drain system connected to the storm sewer as approved by the City Engineer and in accordance sub-section C Drainage Fabric of this section.
In no case shall the subbase material be placed on a wet subgrade. All removal of unsuitable material in the subgrade must be replaced with compacted clay of proper moisture content to a minimum ninety-five percent (95%) modified laboratory density in accordance with AASHTO T99 (Method A or C). The soil support I.B.R. value selected for use by the designer shall represent a minimum value for the soil to be used. An adequate number of soil borings shall be obtained to determine the subdivision’s soil characteristics for street and utility construction purposes. A copy of the Soil Borings Report shall be provided to the City Engineer.
The City Engineer may approve lime stabilization, when soils are compatible as determined by a geotechnical engineer. The lime shall be mixed to a minimum depth of sixteen inches (16") and meet the Illinois Department of Transportation’s guidelines for Lime Stabilized Soil Mixture as outlined in the “Standard Specifications for Road and Bridge Construction”, latest edition.
When the soils report indicates a subbase area below the water table or having poor drainage characteristics, the pavement design must provide additional subbase drainage which will allow the new subgrade to be drained into the storm sewer or roadside ditch system.
On all streets where new pavements meet existing pavements, transitional pavement of no less than 20:1 in length will be required.
The subgrade shall drain to the curb line and to the inlets and catch basins. Water will not be allowed to pocket if applied on the subgrade. Positive drainage must be accomplished on the compacted subgrade or the placement of base material will not be allowed. Verification by the City Engineer of the proper subgrade drainage will be required prior to any additional roadwork.
Per Section VI herein, the base material shall not be placed prior to approval of the subgrade by the City Engineer. The subgrade and base course shall be proof rolled by the Contractor as described below. The Contractor shall contact the City Engineer a minimum of forty-eight (48) hours minimum prior to the “proof roll”.
Proof rolls by the contractor and witnessed by the city engineer will be conducted as follows:
- A loaded truck shall be driven over the area to be tested at a speed, pattern, and number of cycles to be determined by the City Engineer. The test truck shall be the common tractor-trailer type with no more than five (5) axles with a total of eighteen (18) wheels loaded to a net weight of no less than twenty-two (22) tons.
- Any unstable or damaged subbase, base course, or binder course shall be removed and replaced to the satisfaction of the City Engineer.
Final placement of bituminous concrete surface course shall be delayed for a minimum of one full winter. Before the placement of the surface course, all underground utility punch list items for final inspection shall be completed and approved. Also, the binder course patches must be completed and the curb and gutter repaired as required by the City Engineer.
After any binder course deficiencies have been corrected to the satisfaction of the City Engineer and immediately prior to placing the bituminous surface course, the pavement shall be thoroughly cleaned and primed with bituminous materials at a rate of 0.10 gallons per square yards. The pavement shall be primed a minimum of twelve (12) hours prior to placing the bituminous surface course. When bituminous materials are applied under traffic conditions, sanding at the approximate rate of two (2) pounds per square yard will be required. All affected residents and businesses shall be notified a minimum of twenty-four (24) hours prior to placement of bituminous materials.
The bituminous base course, leveling binder, binder course, and surface course mixtures shall be laid on a surface, which is dry and only when weather conditions are suitable. The bituminous base course, leveling binder, and binder courses shall be placed only when the temperature in the shade is at least 45° F., when the temperature in the shade for the previous twenty-four (24) hours is at least 32° F. and when rising temperatures are forecast.
The surface course shall be placed only when the temperature in the shade is at least 50° F., when the temperature in the shade for the previous twenty-four (24) hours is at least 40° F., and when rising temperatures are forecast. Any pavement activity should be stopped in the event of rain, regardless of temperature.
All paving shall be done with a tracked paving machine utilizing electronic grade control of a minimum length of fifteen feet (15').
All bituminous mixtures shall be delivered and handled so that the bituminous mixture immediately behind the paver screed is at or above 270° F. All asphalt delivered to the project shall be covered when the temperature is at or below 70° F.
The deadline for paving is October 31st. However, the City Engineer may approve a written request to allow the installation of binder course after this date provided the above requirements are met. The request must be made in writing to the City Engineer forty-eight (48) hours prior to the requested paving dates, along with a weather forecast for the next ninety-six (96) hours. Requests to pave after November 20 will not be considered. Surface course must be placed the next paving season, after a winter has passed. The asphalt laying pattern must be approved by the City Engineer or his representative in order to minimize transverse joints. A certified nuclear density technician must be on site to set the asphalt pavement rolling pattern and confirm compaction densities. The technician shall revise the rolling pattern as deemed necessary. The technician shall stop the paving operation if the required densities are not being met. Density test results will be submitted to the City Engineer within one week of completion of the paving operation.
The binder course and surface course may be tested for smoothness with a ten-foot (10') straightedge after it has been thoroughly compacted. Any surface variations which warrant penalties per Section 406.21 of the Illinois Department of Transportation Standard Specifications will be paid to the City of Aurora per the following rate per each surface variation:
- Greater than 1/8" but less than 1/4" - $200.00
- 1/4" but less than 1/2" - $400.00
- 1" and greater - Remove and replace a large number of bumps; however, will require complete removal and replacement of the surface course.
From this point to the end of the section, the information tables and excerpts are directly from the Code of Ordinances for City of Aurora Section 42-20 Standards, Specifications for Streets.
Street jogs with centerline offsets of less than one hundred twenty-five (125) feet for local streets at local streets, and two hundred (200) feet for local streets at minor collector streets should be avoided.
Streets shall be laid out so as to intersect as nearly as possible at right angles and, where practical, no street shall intersect any other street at less than eighty (80) degrees.
Property lines at street intersections shall be rounded with a sufficient radius to allow for the installation of utilities and adequate approach sidewalks at the crosswalks.
Dead-end streets (cul-de-sac) designed to be permanent shall be provided at the closed end with a paved turnaround having an outside pavement radius of at least forty (40) feet and a street property line radius of at least sixty (60) feet and shall not be longer than five hundred (500) feet from the centerline of the intersecting street to the radius point.
Streets shall conform to the following table of minimum standards:
|Street||Right-of-Way Width (feet)||Roadway Width from Back of Curb to Back of Curb (feet)||Radius of Horizontal Curves (feet)||Length of Vertical Curves (feet)||Tangent Between Reverse Curves (feet)||Distance Between Drive Openings and Intersecting Curves (feet)|
|Local Industrial and Commercial||66||39||500||200||200||NA/125|
|Collector: Major||Variable; 80 min.||Variable; 41 min.||475||175||175||NA/400|
|Arterial||Variable; 100 min.||49 min.||500||200||200||1200|
|Street||Maximum Gradient (Percent)||Minimum Gradient (Percent)||Posted Speed Limit||Minimum Clear Sight Distance (feet)*||Intersection Curb Radii (Feet)|
|Local Industrial and Commercial||2||0.40||—||500||35|
Algebraic difference in the roadway centerline profile of 1.5% or greater requires a vertical curve in accordance with the table of minimum standards.
*The following criteria are to be utilized for checking clear sight distance:
- 36" to 6" exiting vehicle to approaching vehicle.
- 36" to 24" approaching vehicle to exiting vehicle.
Both of the criteria must meet or exceed the minimum clear sight distance.
All street pavements shall be designed in accordance with the following minimums:
The thickness of the pavements for Major Collectors and Arterials shall be determined in accordance with the current Illinois Department of Transportation “Manual For Structural Design of Portland Cement Concrete Pavement” and the “Manual of Instructions For The Structural Design Of Bituminous Concrete Pavements”. Design Standards shall be not less than for Class III roads and based on a twenty (20) year pavement design.
Minimum Design Criteria
The following are the minimum pavement requirements as established by the City of Aurora that will be required in the design and construction of pavements.
- Pavements shall be constructed of Superpave Bituminous Concrete Mixtures. The bituminous concrete mixtures shall be designed, produced and constructed in accordance with the Modified Strategic Highway Research Program (SHRP) Superpave criteria and current IDOT special provisions for Superpave.
- All roadways shall have concrete curb and gutter Type B-6.12 modified as detailed in Exhibit “II-B-8” of the Appendix herein. All concrete curb and gutter shall be continually reinforced with two (2) No. 4 deformed reinforcing steel bars between expansion joints. Expansion joints shall be constructed at 100' intervals, all points of curvatures, 5' each side of drainage structures and between separate pours. Contraction joints shall be constructed at ten-foot (10') minimum interval as indicated in Exhibit “II-B-9” of the Appendix herein. All curbs shall be cured, protected, and sealed as per Exhibit “II-B-9” of the Appendix herein. The curb shall be installed on a minimum of four inches (4") of open graded granular material crushed stone, gradation CA-7. The compacted curb subgrade shall be shaped parallel to the curb flow line and positively drained to the inlets and catch basins so that any water, if applied, would not pocket in this subgrade.
- Pavement cross slope shall be two percent (2%) from the center of the road to the edge of the pavement.
- All roadways shall be constructed on a select compacted subgrade, graded parallel to the finish surface.
2. Typical Cross Sections for Local Residential Streets, Minor Collector Streets, Major Collector and Industrial Streets
All proposed roadway classifications should be consistent with the City of Aurora Comprehensive Plan.
The below table refers to the minimum design thickness for each roadway material for various road designations. For all the below sections, the Bituminous Concrete Binder Course shall be Superpave, maximum allowed RAP of 30%and the Bituminous Concrete Surface Course shall be Superpave, maximum allowed RAP of 15%. In addition, the CA-6 base course shall be compacted to a minimum ninety-five percent (95%) modified laboratory density in accordance with AASHTO T99 method A or C.
|Street||Subbase Granular Material, Type B (CA-6)||Bituminous Concrete Binder Course, Superpave, IL-19||Bituminous Concrete Surface Course, Superpave|
|Local Residential||10"- Crushed Stone or 12" -Crushed Gravel||2-½" - N50||1-½" - Mix “C”, N50|
|Minor Collector||10"- Crushed Stone or 12" -Crushed Gravel||4-½" - N50||1-½" - Mix “C”, N50|
|Major Collector||6"- Crushed Stone or 8" -Crushed Gravel||10" - N50||1-½" - Mix “D”, N50|
|Arterial Street||6"- Crushed Stone or 8" - Crushed Gravel||12" - N70||1-½" - Mix “D”, N70|
Fabric shall be Amoco ProPex 4551 or approved equal. Storage and handling of fabric shall be in accordance with the manufacturer’s recommendations except that in no case shall the fabric be exposed to heat or direct sunlight to the extent that its strength or toughness is diminished. Torn or punctured fabric shall not be used.
For a material to be considered an approved equal, the following material properties must be met or exceeded:
- Puncture Strength (ASTM D4833) - 90 lbs.
- Mullen Burst (ASTM D3786) - 310 psi
- Trapezoidal Tear Strength (ASTM D4533) - 65 lbs.
- UV Resistance (ASTM D4355) - 70% @ 500 hrs.
The construction of curb & gutter, sidewalk and drive approaches shall begin no sooner than the first Monday in April and be completed no later then the third Friday of October. Actual date will be determined each year by the City Engineer. Unless authorized in writing by the City Engineer, concreting operations shall be discontinued when the air temperature in the shade is below 45°F.
All public sidewalks shall be constructed of concrete with the following specifications:
- The concrete used shall be Class “SI” concrete. Membrane curing shall be applied as specified in Section 722 of the State of Illinois “Standard Specifications for Road and Bridge Construction”, latest edition. W. R. Meadows VOCOMP-20 Cure & Seal, or approved equal, shall be used per manufacturer’s specifications.
- The base shall be four inches (4") of compacted crushed stone base on a dry natural or compacted subgrade. In no case shall the base be placed on a subgrade of topsoil or other unsuitable material.
- The sidewalk shall be five feet (5') wide and shall be placed within the Right of Way, one foot from the property line. The sidewalk shall be placed a minimum of five inches (5") thick. At all residential drive locations this minimum thickness shall be six inches (6"). At all commercial drive locations this minimum thickness shall be eight inches (8").
- The surface finish shall be a light broom finish.
- Sidewalk curb ramps with a detectable warning surface shall be constructed at all crosswalks according to IDOT Standard 424001, BDE Manual and the Exhibit II-D-1. The detectable warning shall consist of an area of truncated domes that begin 6 inches from the back of the curb and continue 2 feet in the direction of pedestrian travel. The concrete ramp shall be integrally colored red and 6" thick.
- The sidewalk shall be constructed with contraction joints at five foot (5') intervals and shall be saw cut to a minimum depth of one inch (1") full width within twenty-four (24) hours of concrete placement, or tooled at the time of placement to the same depth.
- Expansion joints of three-fourths inches (3/4") full depth bituminous fiber material are required where the new sidewalk abuts all curb, buildings, poles, other structures, through all drives on each side and at regular 100 ft intervals.
- Class SI concrete as specified in the IDOT “Standard Specification for Road and Bridge Construction” shall be used on all sidewalks. A receipt from the concrete supplier with this information and the location and date of the pour shall be submitted to the City prior to any City approvals of said work.
- The contractor shall notify the City Engineer forty-eight (48) hours prior to placing the concrete for an inspection of the base and formwork.
All drive approaches shall be constructed with a depressed curb with an 18" transition to make a neat transition to the curb opening and shall have a flare of 3' at the street. All drive approaches shall be constructed to a maximum grade within the Right of Way of six percent (6%). In no case shall the algebraic difference of the drive grade and the street grade exceed eight percent (8%). See Exhibit II-E-1.
Existing curbs may be saw cut to form the depression for the drive approach. Where the drive approach is to have curb and gutter that is proposed to connect to the existing curb and gutter, the existing curb may be saw cut to form the depression, but the curb and gutter at the transitions shall be removed and replaced to form a smooth transition.
Where private streets, drives, entrances, and alleys intersecting public streets, the public street curb and gutter shall remain continuous across the access and depressed where needed.
The contractor shall notify the City’s engineering department forty-eight (48) hours prior to placing the concrete for an inspection of the base and formwork.
All drive approaches shall be constructed as a minimum to the following standards:
- Six inches (6") of Class SI Portland Cement Concrete, non-reinforced with a continuous six inch (6") bituminous fiber expansion joint at the sidewalk and at the back of the curb. It shall be cured and protected as per the requirements for sidewalk. Pavement shall be placed on a compacted stone or gravel base to a depth of four inches (4") minimum.
- Two inch (2") minimum bituminous concrete surface course which shall be placed on eight inches (8") minimum, after compaction, (CA-6) crushed stone base course, crushed gravel base course.
Industrial and Commercial Drives
Eight inches (8") of Class SI Portland Cement Concrete, non-reinforced with a continuous six inch (6") bituminous fiber expansion joint at the sidewalk and at the back of the curb. It shall be cured and protected as per the requirements for sidewalk. Pavement shall be placed on a compacted stone or gravel base to a depth of four inches (4") minimum.
Steel plate beam guardrail shall be provided when an embankment is six feet (6') or higher, having a side slope steeper than 6:1 and when, in the judgment of the City Engineer, it is necessary to provide protection against roadside obstacles or a non-traversable roadside hazard. Buried end sections will be required at both ends of all guardrail installations.
Regulatory signs will be required by the developer where shown on the final engineering plans. All such signs shall conform to the State of Illinois “Manual On Uniform Traffic Control Devices For Streets and Highways”, latest edition, including the erection thereof.
Stop signs shall be 30" x 30" on all streets. Yield signs shall be 30" x 30". Speed limit signs (R2-1) shall be 24" x 30". Warning signs shall be 30" x 30". No Parking signs shall be 24" x 18".
All posts shall be Uni-Strut, 10', 2" square, 14 gauge in a V-Loc base, or approved equal
All sign faces shall be 3M Company, or approved equal, using reflective high intensity paper.
Stop signs will be required where collector streets intersect with arterial streets and include a 24" Stop Bar.
All striping shall follow IDOT Standards and shall be Thermoplastic Pavement Markings, Type E.
At each street intersection there shall be installed one or more street name signs showing the names of the streets and shall be indicated on the construction plans. Street signs shall be installed, by the developer, prior to issuance of building permits.
All local road intersections shall have one street sign on the northerly and easterly corner. Collector and major streets shall have two (2) street signs, one on the northerly and easterly corner and one on the southerly and westerly corner of the intersection. Signalized intersections shall install the two (2) required signs on the appropriate overhead mast arm per the applicable IDOT standard. An exception would be a tee intersection where one sign would be required on the terminating street side of the intersection on the northerly or easterly corner thereof. All street signs shall be set five feet (5') back from the curb on the radius midpoint. All street signs shall conform to the following specifications:
- All street signs shall conform to the State of Illinois “Manual On Uniform Traffic Control Devices For Streets and Highways”, latest edition, including erection thereof.
- The flat aluminum blanks shall be 9" in height for collector and major streets and local streets. Sign length is twenty-four inch (24") minimum or as determined by length of street name. Blanks shall have a three-quarter inch (¾") radius at all corners. See Exhibit “II-H-1”.
- The blank faces shall be covered with 3M # 3990 Vip Diamond Grade White Film. The letters shall be cut and removed from 3M # 1177 Green Film and then placed over the white film to produce white letters on a green background. See Exhibit “II-H-1”.
- Nine-inch (9") signs are covered on one side but two are required for each street. They are riveted to the sides of a 12' long, 2"square, 14 gauge Uni-Strut post in a V-Loc base, one per side for each street name with enough room at the top for a cap on the post.
- The street signs shall be in place prior to the issuance of any building permits. Temporary street signs constructed of wood with neat lettering may be installed with seven foot (7') clearance prior to the issuance of any building permit and must be removed immediately after the placement of the permanent street sign.
In the case of anticipated installation of an all-way stop or traffic signals, relating to development, the Developer, at the request of the City Engineer, will be responsible for hiring a qualified traffic engineering consultant to conduct a traffic impact study. The study will include, but is not limited to, a manual traffic count, existing and proposed average daily traffic (ADT) volumes, for all involved roadways, and traffic control warrant analysis and justification. If the City Engineer agrees with the warrant justification for traffic signal installation, an intersection design study, with “Highway Capacity Manual” intersection analysis, will be required for review.
The manual traffic count may include pedestrian movements and/or accident data to justify meeting an acceptable warrant, as stated in the current edition of the Federal Highway Administration “Manual on Uniform Traffic Control Devices”. The duration of the manual count must be a minimum of four hours and could require up to twenty-four (24) hours to justify warrants.
Traffic Signal Equipment shall comply with the applicable portions of the following Traffic Signal Specifications, Effective: January 1, 2002, Revised: May 22,2002, except as modified herein:
Traffic Signal Post, Mast Arm Assembly and Pole
Combination Mast Arm Assembly and Pole
Only galvanized steel, from an IDOT approved vendor or Millerbernd weathering steel will be used, determined by the City Engineer.
For weathering steel, these items shall be fabricated with a minimum yield strength of 50 ksi and have weathering characteristics of ASTM-A588 or A606 and have an 8 sided tapered cross section. The poles, posts, and mast arms shall have only one longitudinal seam weld and be one piece.
After fabrication, the completed unit shall be sand blasted to a near white finish and then painted with one coat of primer and two coats of bronze paint as specified by the Engineer. All connecting hardware shall be stainless steel.
Signal Heads and Pedestrian Heads
Connecting hardware and mounting brackets shall be galvanized steel painted black.
Maintenance and Responsibility
For the items “Maintenance of Existing Traffic Signal Installation”, “ Temporary Traffic Signal Installation(s)”, the contractor shall be responsible for placing stop signs for the intersection approaches, in the event of a power failure. Contractor is also responsible for restoring the normal traffic signal sequence operation when power is restored. The Contractor shall respond to the emergency call from the City or others within one hour after notification.
Electric Service Installation
Overhead electric service cables shall enter a waterproof, sealed pathway consisting of a weather head, pole attached conduit, flexible conduit, to the pole mounted service cabinet. All connections must be waterproof so no moisture and/or dust can enter the pole mounted service cabinet. Conduit, containing ground cable from the service cabinet, shall extend to ground level, to prevent lawn maintenance from damaging the grounding cable.
Traffic Actuated Controller
All controllers shall be NEMA TS2 Type 1 with the most recent model and software version supplied by one of the IDOT District One approved closed loop equipment manufacturers, at the time of approval. Unless otherwise specified, controller must be fully compatible and equipped for a fiber optic traffic signal interconnect.
Grounding bushings must be used for all conduits entering the controller cabinet.
Unless specified other by the City of Aurora, installation of street lighting shall conform to the National Electrical Codes and National Electrical Safety Code, most current edition.
All street lighting plans shall be designed by a Professional Engineer duly registered in the State of Illinois.
The City Engineer and/or the City’s Director of Public Properties must receive catalog cuts for the streetlights and underground wiring for review and approval before commencement of construction.
The developer and/or his engineer shall be held responsible for coordinating of all phases of the work and correcting any deficiencies to the satisfaction of the City Engineer and/or the Director of Public Properties.
In all installations either commercial or residential, when the feed goes to a Com Ed pole an appropriate sized fused weatherproof disconnect shall be installed on the pole, 8 ft. above the ground. One-inch (1") diameter rigid conduit shall be used at the ground level. Non-conductive PVC may be used above the disconnect. Or may be provided by Com Ed, when applicable. City is not responsible for any violations to Com- Ed standards by contractors. Contractor is responsible for making necessary arrangements ahead of time with Com Ed to insure the connection meets their requirements.
After the streetlight installation is complete, the electrical contractor or developer shall provide the Director of Public Properties and/or his designee two (2) sets of as built plans with lot numbers and street addresses. A letter is required requesting inspection by the City’s Electrical Maintenance Division for ComEd to energize streetlights. The letter shall include all pertinent information such as but not limited to electric load, wire size, lamp wattage, voltage, and number of lights to be energized.
Until such time that the City Council formally accepts the street lighting improvements, the only streetlight maintenance provided by the City of Aurora is limited to lamp and fuse replacement. Additionally, locating of underground streetlight wiring shall be the sole responsibility of the developer until the City Council formally accepts the streetlight improvements.
Third Party Owners are responsible for all sections of this ordinance. The City of Aurora, will only accept maintenance responsibility for streetlights upon final acceptance by the City Council.
In the event that repairs and/or replacement of streetlights are not made to the City of Aurora’s satisfaction or within thirty days of City notice, the City reserves the right to draw on the posted Letter of Credit to pay a contractor and/or to reimburse the City for costs for such repairs.
In all cases, the streetlights shall be installed prior to the issuance of any occupancy permits.
If work is performed within IDOT Right of Way, the contractor is required to be pre-certified with IDOT.
Voltage drop shall be no greater than three percent (3%) from power supply to last unit with no wire size smaller than No. 6 AWG, Type RHH or RHW Underground Service Cable. (USE) (XLPH)
Power Supply Location and Connection
The location and connections to a power supply shall be made to comply with ComEd Company rules and regulations as amended from time to time.
Street Lighting Controllers
Shall be manufactured by Excel Limited or approved equal, using Square D lighting contactors, time delay relay, and circuit breakers. Twist lock photocells shall be mounted on the control box. Voltage networks will be 120/240 volt. Where each fixture will have 120 volts, 240 volts is the maximum voltage allowed per light fixture in a non residential area, unless authorized by the City Engineer and/or Director of Public Properties and shall be approved prior to any work permits being issued. Residential areas are straight 120 volt only. 120/208 –3 phase lighting systems are applicable in the Central Business District where each fixture will have a 120-volt supply. All street light controllers and control cabinets shall have electric meters. The contractor shall be responsible to install the meter socket and meter jumpers if applicable.
Where a conduit crosses a roadway, a cast in place hand hole or approved equal will be installed on both sides of the roadway. In no case will a conduit run be more than two hundred feet (200') from pole to pole or from hand hole to pole on arterial roads.
The manufacturer or distributor shall guarantee streetlight standards, luminaries, ballast, lamps, and cables for its proper use from one year after the date of acceptance.
Maximum spacing shall not exceed three hundred feet (300') between luminaries.
There shall be at least one streetlight on each intersection, curve, and cul-de-sac and the City of Aurora may require a streetlight to be placed at other points in special conditions. They shall be located on the property lines and on the opposite side of the street from the water main wherever possible and shall be set two feet (2') from the back of curb to the face of pole. Installation of the required collector/arterial streetlight pole and luminaries may be required where residential or minor collector streets intersect with major collectors or arterials.
Luminaries of the Type II Distribution as approved by the Illuminating Engineering Society (hereinafter for brevity referred to as I.E.S.) shall be used in residential areas. Luminaries of Type III or Type IV I.E.S. distribution shall be used in commercial areas. The City Engineer may designate that I.E.S. Type V Distribution luminaries be used in the public interest under special conditions.
On individual control of lights, the photoelectric control shall be mounted on top of the luminaire. The control of a group of lights shall be limited to on light fixture per one photocell. Therefore, multiple light fixtures shall not be connected in series to one photocell.
All commercial driveways, street and drive approaches shall have a minimum two inch (2") rigid conduit sleeve that will encase the minimum one inch (1") Uniduct. Residential driveways and sidewalks only require the placement of the one-inch Uniduct. The Uniduct will be continuous from the source to the pole or from pole to pole. All exposed conduit transitioning to above grade shall be rigid conduit except where Uniduct enters the lower entrance on the streetlight pole.
Only Schedule 40 Uniduct manufactured of high-density polyethylene, Type III, Grade P34 Class C material manufactured in accordance with NEC Article 343 for pre assembled Cable in Duct or approved equal may be used. Minimum one inch (1") inside diameter PVC Uniduct conduit with direct burial No.6 minimum wire shall be used. All underground Uniduct containing underground cable shall be buried at least eighteen inches (18") below the finished grade. Direct burial cable without an approved raceway shall not be allowed in any installations unless authorized by the City Engineer and/or the Director of Public Properties.
All Uniduct cable sections shall be continuous and no wire splicing shall be made underground unless placed in a hand hole.
Underground Cable Location
Underground raceway shall be installed in a trench a minimum of two feet (2') from the back of the curb (away from the street) or 1ft. either side of the sidewalk. Cable shall not be installed directly underneath and along the length of the sidewalk without prior approval from the City Engineer and/or Director of Public Properties.
Underground feeders connected to an overhead electric service shall be fused at or below their rated capacity. Each standard shall contain in-line fuse holders with proper fusing in series with each ungrounded conductor to protect the luminaire located on that pole. All fuse holders shall be covered with rubber insulating boots.
Streetlight Standard and Bracket
Local and minor collector street poles shall be Ameron SEH-5.8 (212S) with SH-APD-4 Aluminum pipe arms or Stresscrete E240-APH-G-S35 C/W 184 H or approved equal. Luminaire shall be mounted 19'’-9" above the street, shall have a four foot (4') arm and shall be buried a minimum of five feet (5') below grade and backfilled with crushed CA-6 limestone watered and compacted around the butt of the pole.
The luminaire shall be General Electric M2AR-15-S1A2-AMS21 or American Electric Equivalent part # 313-5-62-6-2-60-0 or approved equal. The luminaire shall be fitted with General Electric Company Lucalux high-pressure sodium lamps LU 150/55/D with Auto Reg. and/or CWA type ballasts, or approved equal. Also, any other fixtures used in the City of Aurora (200 watt, 250 watt, 400 watt) shall be the G.E. MDRL style with the power door or the American Electric fixture with similar part numbers and power door. Additionally, photocells shall be manufactured by Tork (part #2007) or approved equal.
Where non-standard poles and/or luminaries are approved, spare materials at no cost to the City may be required as a condition of approval.
The below standards shall also apply at intersections with residential and minor collectors where standard street lighting does not currently exist on the major collector street or arterial.
Streetlight Standard and Bracket on Arterial or Collector Streets
The pole shall be Millerbernd Manufacturing Company part number HA8-400-SW- PT. The lighting pole will be fabricated from weathering steel painted with 2 coats of bronze paint with minimum yield strength of 50 ksi. The mounting height shall be forty feet (40'). Also a pole manufactured by Union Metal Manufacturing Company #154-Y8S 30' MH 12' arm with satin finish is acceptable in approved locations.
If the proposed plans require a break away system, the City of Aurora requires the use of transformer bases (TB5-9 or TB6-9) to match the bolt circles. Where a breakaway system is not required. The pole shall not be set directly on the concrete base and therefore a minimum of two-inch (2") gap shall be required between the base and the pole. The two-inch (2") gap shall remain open for air circulation. Additionally, screens shall be installed around the two-inch (2") gap.
The pole and luminaire arm will have only one longitudinal seam weld. The pole and luminaire arm will be one piece; absolutely no multi-sectional welded or slip fit design poles will be allowed. The pole shall have an octagonal (8 sided) cross section. After fabrication, the completed pole and luminaire arms will be sandblasted to a near white finish. The installing contractor will be careful to clean the pole of all dirt and oil prior and after erection of the pole to insure uniform weathering. All connecting hardware will be stainless steel. The luminaire arm will be six (6) sided with a universal simplex bracket.
The pole will be designed to hold the luminaire arms as indicated on the plans in accordance with the latest edition of the “Standard Specifications For Structural Supports For Highway Signs, Luminaries And Traffic Signals” as written by the American Association of State Highway and Transportation Officials. The design wind velocity will be 80 MPH with a 1.3 gust factor.
The light standard shall be designed to hold two (2) luminaries weighing 64 pounds each and with a projected area of 2.3 square feet each with a design wind velocity of 80 MPH and a gust velocity of 104 MPH. The pole design shall meet the latest edition of specifications for luminaire standards as published by AASHTO (American Association of State, Highway and Transportation Officials). A complete set of catalog cuts and drawings of the pole and luminaire shall be submitted.
The pole shaft shall be fabricated from steel conforming to ASTM-A588 or A606. The base plate shall be fabricated from steel conforming to ASTM-A588. There will be a 4" x 6" reinforced hand hole one foot (1') up from the base of the pole. Pole sections shall be 11 GA. Each pole shall be supplied with one (1) or two (2) lighting arms as required. Lighting arms shall be attached with a two (2) bolt simplex bracket. Lighting arms shall be six (6) sided, fabricated as shown on the standard drawing. Each arm shall be provided with a 2" I.D. (2-3/8" O.D.) by 7-1/2" long tenon. The luminaries shall be installed 8'0" from the pole. The base plate will be 13-1/2" square, 3/4" thick with a minimum 5" diameter hole. The base plate will have four (4) – 1-3/16" holes on 13-3/4" bolt circle to attach to the anchor bolt foundation. All pipes shall be rigid, or approved equal, weathering steel pipe.
Each pole shall be connected to the ground by means of a copper wire of the #10 size and shall be welded to the inside wall of the pole and connected to a 5/8" diameter, eight foot (8') long copper clad steel ground rod. The upper end of the ground rod shall be at least one foot (1') below finished grade. The grounding of the streetlight fixture and arm shall be in accordance with the locally adopted electrical code.
The foundations shall be concrete foundations, Type E, 24" as specified in the “Standard Specifications For Traffic Control Items” current edition as adopted by the State of Illinois Department of Transportation. Galvanized auger type foundations may be used with certain streetlight poles in special applications with approval from the City Engineer and/or Director of Public Properties.
The luminaire shall be a baked-on bronze, General Electric Decashield 400 series luminaire DSME31S0A2GMC3DB or American Electric 153-0H1L2-6J with high-pressure sodium 310W ballast for 120 or 240-volt operation. NOTE: fixtures that are operated by a controller DO NOT require a photocell receptacle. A computer printout will be required to establish spacing. The standards for lighting levels shall be those recommended by the I.E.S. minimums and maximums.
The control of a group of units shall be limited by the voltage drop calculations.
All rigid galvanized conduits for placement under driveway aprons in non-residential areas and under residential streets shall be a minimum two inches (2"). All Uniduct will be a minimum of 1-inch diameter.
Underground cable shall be minimum #6 AWG, Type RHW, USE or XLPH and shall be installed in approved raceway from power supply to pole base and/or pole to pole without splices. 120-volt systems shall have 3 wires installed in the Uniduct (1 hot, 1 neutral and 1 ground). Ground wire shall be either bare wire or insulated with green markings and can be one size smaller than current carrying conductor. All systems shall contain a separate ground wire besides the current carrying conductors.
Wire (pole and Bracket)
Wire installed from the hand hole in the base of the pole to photocell and luminaire shall be #10 AWG, type RHW, USE or XLPH. The ground wire shall be at least #12 AWG.
All parkways within the dedicated street Right of Way shall be graded with a minimum of four inch (4") of topsoil and seeded, Class I minimum, or installation of sod in an approved manner. The minimum gradient of all parkways toward the curb shall be two percent (2%) and the maximum shall be six percent (6 %). If the parkway is constructed at a gradient of four percent (4%) or greater, then sod, jute mat or excelsior blanket will be required.
Healthy and properly pruned street trees, having a trunk diameter measured twelve inches (12") above the ground level of not less than two and one-half inches (2-1/2") shall be planted along all streets at a rate of one (1) tree per lot with the exception of corner lots which shall have two (2) trees, one (1) on each street frontage. Tree locations shall be shown on the final engineering plans as to minimize conflicts with underground utilities.
No tree shall be planted closer than fifty feet (50') of any Right of Way intersection, closer than one hundred feet (100') from any traffic control device, or closer than ten feet (10') from a driveway or underground utility structure.
All landscaping with in the Right of Way is to be in accordance with the Landscaping Plans duly processed by the Planning department and approved by the City Council.
Temporary turn arounds when required by, Section 42-20(q) of the Subdivision Control Ordinance, City of Aurora, shall be constructed with the following specifications:
- The geometry of this temporary paving shall be a “T” configuration at the end of such a street which is paved from inside of sidewalk to the far side, inside of sidewalk fifteen feet (15') wide with two (2) five foot (5') radii to the street. The curb and gutter shall not be constructed through the temporary turn around.
- The temporary turn around shall be paved with eight inches (8") of compacted crushed limestone base and two inches (2") of bituminous concrete surface course with no curb and gutter around.
- The section of sidewalk through the temporary turn around shall be six inches (6") thick.
- The Developer extending the street in the future shall remove the excess paving and base, construct the additional curbing so that the curb and gutter is continuous and uninterrupted from one development to another development, and shall landscape the parkway where disrupted by the asphalt and base removal.
Any street cut, which is permitted by the City Engineer, shall be temporarily patched in accordance with Exhibit II-N-1 and shall be restored to the requirements of Exhibit II-N-2 or II-N-3 as applicable. A bonded and licensed contractor per City ordinance shall accomplish all work with a fully executed Excavation Permit from the City Engineer.
Half streets shall be prohibited except where essential to the reasonable developments of the subdivision in conformity with the other requirements of these regulations and where the City Engineer finds it will be practicable to require the dedication of the other half when the adjoining property is subdivided. Wherever an existing half street is adjacent to a tract for which subdivision is sought, the other half of the street shall be platted within the proposed subdivision.
The initial half street dedication shall be one-half (1/2) of the required Right of Way in width, with a ten foot (10') parallel utility easement, and shall be of sufficient length to provide proper transitions with a minimum pavement width of twenty-two and one-half feet (22.5') to the back of curb and of sufficient length to provide proper transitions.