Figures 1.01 and 1.02
reflect the trends in injury and fatal crash
rates per 100 million vehicle miles traveled
(MVMT) from 1967 to 1997. Both injury and fatal
crash rates have been steadily decreasing. The
injury crash rates were highest in the late
sixties. A large decrease occurred in 1980.
The fatal crash rates have markedly
decreased from 4.4 per 100 MVMT to 1.5 per 100
MVMT. The biggest decrease in fatal crash
rates occurred after the implementation of a 55
MPH speed limit in 1973.
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