Roadway Geometric Design: design_vehicle
AASHTO Green Book 7th Edition (2018) roadway geometric design standards — stopping sight distance (15–80 mph), passing sight distance (20–70 mph), minimum horizontal curve radius by design speed and emax (4%/6%/8%), K-values for crest and sag vertical curves (25–80 mph), maximum grade limits by terrain type (level/rolling/mountainous) and road class (freeway/arterial/collector/local), superelevation standards, lane and shoulder width standards, and design vehicle dimensions (P, SU, WB-40, WB-62, WB-67).
| parameter type | record id | description | notes |
|---|---|---|---|
| design_vehicle | dv_P | Passenger car (P) design vehicle dimensions | Overall length 19.0 ft; width 7.0 ft; height 4.3 ft; front overhang 3.0 ft; rear overhang 5.0 ft; wheelbase 11.0 ft; min turning radius 23.8 ft |
| design_vehicle | dv_SU | Single-unit truck (SU-30) design vehicle dimensions | Overall length 30.0 ft; width 8.0 ft; height 13.5 ft; front overhang 4.0 ft; rear overhang 6.0 ft; wheelbase 20.0 ft; min turning radius 42.0 ft |
| design_vehicle | dv_WB40 | WB-40 intermediate semitrailer design vehicle | Overall length 45.5 ft; width 8.5 ft; height 13.5 ft; tractor WB 12.5 ft; trailer length 33 ft; min turning radius 39.9 ft (CTR); represents local delivery trucks |
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