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Pace Development Guidelines |
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Pace Development Guidelines |
Roadway Pavement
Generally, municipal subdivision street pavement design standards for local/collector roads are appropriate to handle Pace vehicle design and service volume. To insure that these standards are adequate for transit service, Pace recommends that pavement be constructed to handle vehicles with loads of 20,000 lbs. per axle. Rigid (concrete) and flexible (asphalt) pavement designs have been recommended for roadways, driveway aprons, access aisles where heavy bus use is anticipated and at bus stop areas. These pavement designs, illustrated in Figure IV-1, have the ability to retain pavement shape, drainage capabilities and skid resistance. Developers can contact Pace to determine the need for roadway modifications and for assistance.
For bus stop areas, including bus turnouts and terminals, the rigid design is strongly recommended. Due to loads and shear forces applied to pavement surfaces during bus starting and stopping movements, this pavement surface has the best potential to retain its shape. The pavement should be designed with a minimum 8" portland cement concrete jointed reinforced pavement on a 4" subbase of stabilized granular material. (1)
This pavement design conforms to IDOT standards for Class II roadways. However, if local ordinances exceed this requirement for commercial and industrial driveways or parking areas, that standard should be followed.
1. Illinois Department of Transportation, Bureau of Design, Design Manual (Springfield, Illinois: May 1982), Table 7-100.07.
Revised:November, 1999.