•

•

•

0 5

45

85

0

20

40

60

80

100

0 10 20 30 40 50

% C

han

ce o

f F

ata

lity

Impact Speed (mph)

Source: U.K. Department of Transportation, Killing Speed and Saving Lives, London, 1987.

Pre-1950’s

Grid

Tree

550 Intersections per Square Mile

110 Intersections per Square Mile

45 Intersections per Square Mile

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