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Multi-Modal Handbook

Vehicle Characteristics

Also known as: Vehicle turning radii and dimensions

Vehicle Characteristics

The dimensions and operating characteristics of selected motor vehicles.

Standard

Select Vehicle Dimensions and Turning Radii
Vehicle Dimensions and Turning Radii
Symbol Design Vehicle Type Width (ft) Length (ft) A. Minimum Design Turning Radius (ft) B. Minimum Inside Turning Radius (ft)
P Passenger Car 7.0 19 24 14.4
SU Single Unit Truck/Ambulance 8.0 30 42 28.3
BUS-40 Intercity Bus 8.5 40 45 27.6
A-BUS Articulated Bus 8.5 60 39.8 25.4
WB-40 Intermediate Semitrailer 8.0 45+ 40 19.3
WB-50 Large Semitrailer 8.5 55 45 17.0
WB-62 Interstate Semitrailer 8.5 69 45 7.9
WB-67 Interstate Semitrailer 8.5 74 45 4.4
WB-100T Triple Trailer Combination 8.5 105 45 9.9
WB-109D Turnpike Double Combination 8.5 114 60 14.9
MH Motor Home 8.0 30 40 25.9
P/T Car and Camper Trailer 8.0 49 33 17.4
P/B Car and Boat Trailer 8.0 42 24 8.0
MH/B Motor Home and Boat Trailer 8.0 53 50 35.1
Source: AASHTO - A Policy on Geometric Design of Highways and Streets (2004)

Recommendation

Follow the recommendations of AASHTO's, A Policy on the Geometric Design of Highways and Streets.

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The entire Multi-Modal Handbook PDF may be downloaded here.