(Solution Download) example 1

A temporary diversion has been constructed on a highway of +4 percent gradient due


to major repairs that are being undertaken on a bridge. The maximum speed allowed


on the diversion is 10 mph. Determine the minimum distance from the diversion that


a road sign should be located informing drivers of the temporary change on the




- Maximum allowable speed on highway = 70 mph


- Letter height of road sign = 4 in.


- Coefficient of friction between tires and pavement = 0.2


- Perception-reaction time = 2.5 sec


Assume that a driver can read a road sign within his or her area of vision at a


distance of 40 ft for each inch of letter height


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