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Pace Development Guidelines |
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Pace Development Guidelines |
B. INTERSECTION RADII
The radius of an intersection should be designed to facilitate turning movements and minimize lane encroachment by buses. Proper intersection design will allow appropriate bus operating speeds, decreased conflicts between buses and other vehicles at intersections, reduced travel times and improved passenger comfort. Major factors that should be considered when determining intersection radii include on-street parking arrangements, the angle of intersection, transit vehicle turning radii, number and width of roadway lanes and vehicle operating speeds.
During turning movements, transit vehicle encroachment into adjacent lanes of traffic is to be avoided whenever possible to reduce vehicle conflicts. To accommodate the transit vehicle's 50-foot radius turn, parking should either be restricted or arranged to allow the vehicle to make smooth, unobstructed movements. Pace recommends a 60-foot parking setback on the bus' approach to the bus stop and a 40-foot parking setback on the entry road. These setbacks are to begin at the respective corner tangent points and are sufficient to allow a 40-foot bus to pull up to the curb just beyond the bus stop sign. Parking setbacks will reduce conflicts between transit vehicles and parked cars thereby allowing proper transit vehicle turns. The bus stop locations and parking setbacks are illustrated in Section V, Figure V-1.
Revised: November, 1999.