Carbon Footprint of the U.S. Population: Causes and Spatial-Temporal Pattern. VMT and PMT. Class Project ME/ENV 449, 2007 Grace D. W. Johnson Instructor: R. Husar . Introduction to Causality Factor – VMT and PMT. Two of the statistical criteria used:
VMT and PMT
ME/ENV 449, 2007
Grace D. W. Johnson
Instructor: R. Husar
The number of family/personal business and social/recreational trips exceed even the number of work and work-related trips.
The number of pleasure trips is more than three times the number of trips for any other purpose.
Note that 12.7% of all long distance trips are for commuting to work.
Long distance mean trip length has decreased by 29% from 1977 to 2001, as the number of annual person-trips have increased 402%.
The percentage of long distance PMT versus total PMT has almost doubled in this same time period.
The increased number of long distance trips has added up to 3.5 times the PMT for long distance as in 1977.
Wyoming, one of the lowest in population, is the nation’s largest in VMT, while New York has one of the lowest VMT!