Nicola Twilley reports on the Federal Transit Administration's proposal to change the average passenger weight from 150 lbs to 175 lbs:

The FTA's earlier 150 lb passenger weight assumption was based on calculations carried out by the National Highway Traffic Safety Administration in 1971, which in turn was based on data gathered by the Centers for Disease Control between 1960 and 1962. In its October 22, 2008, National Health Statistics Report, the CDC reported an average male adult weight of 194.7 lbs and an average female adult weight of 164.7 lbs.