Unit Transportation Planning Implications
Roadway LOS, traffic congestion delay. Favors investments that benefit peak-period vehicle travel and automobile-dependent urban areas (where congestion is worst).
Peak-period vehicle-mile Favors investments that benefit peak-period vehicle travel.
Lane-mile Favors investments in areas with maximum public roads, such as rural areas.
Vehicle-mile Favors investments in automobile-dependent areas.
Vehicle-trip Favors investments in automobile-dependent urban areas.
Passenger-mile and ton-mile Equal consideration to automobile, transit, ridesharing improvements.
Passenger-trip Equal consideration to all transportation modes, including walking and cycling.
Per capita Equal consideration to all access improvements, including mobility substitutes and land use management strategies.
Comparing Measurement Units
The table above compares how various measurement units tend to affect transportation planning decisions.