Reading Times

30 MPH 40 MPH 60 MPH 80 MPH
6″ Letters 1.4 SecondsThe average time it
takes to blink is about
0.4 seconds.
1 Seconds 0.7 Seconds 0.5 SecondsA RattleSnake strike is usually completed in about 0.5 seconds
8″ Letters 1.8 Seconds 1.4 Seconds 0.9 Seconds 0.7 Seconds
12″ Letters 3 Seconds 2 Seconds 1.5 Seconds 1 Seconds
18″ Letters 4 Seconds 3 Seconds 2 Seconds 1.5
24″ Letters 5.5 Seconds 4 Seconds 2.75 Seconds 2 Seconds
36″ Letters 8 Seconds 6 Seconds 4 Seconds 3 Seconds
Length of Time Letters Are Readable While Driving