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Post by Kai on Aug 6, 2007 12:53:10 GMT -7
Keeping Polish people alive on wet highways .... and other people as well. Here is an interesting demonstration of how tire (tyre) tread depth automobile stopping power on wet roads. www.tirerack.com/tires/tests/includes/min_tread_vid.jspFor people with metric measures, number equivalents are: tread depth 12/32" = 9.5 mm 4/32 = 3.2 mm 2/32 = 1.6mm speed 44mph = 71 kmh 47 mph = 76 kmh length - stopping distances automobile 195.2' = 59.5 m 290' = 88.4 m 378.8' = 115.5 m pick up truck 255' 77.8 m 377.8' = 115.2 m 499.5 = 152.2 m Water depth is given as 5/100" to 6/100" ' = feet " = inches
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