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Pace Development Guidelines |
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Pace Development Guidelines |
B. VEHICLE TURNING RADIUS
The transit vehicle turning radius should be considered when constructing roadways, intersections and transit facilities that will accommodate Pace transit vehicles. Pace recommends designing for a minimum 50-foot outside turning clearance to ensure proper maneuverability of all Pace vehicles. This turning radius is represented in Figure III-2. A template, that can be used for project design, is provided in Appendix E. The template presents the turning radius at 20' and 50' scales in order to meet your design needs.
The 50-foot design radius meets Pace's vehicle turning needs under ideal operating conditions. Minimum clearances are generally sufficient for ideal conditions at speeds of less than 10 miles per hour.
Additional leeway should be provided where higher vehicle speeds may be encountered, in areas of severe traffic congestion, and where sight lines are restricted. A radius greater than the 50-foot minimum dimension is recommended to produce smooth vehicle turns, reduce encroachment by the bus into adjacent areas, and permit adequate margins for snow accumulation conditions found in northeastern Illinois.
Revised: November, 1999.