a) A lane merge warning sign (shown below) is being installed near an entrance ramp on a freeway with operating speeds of 80 mph. Calculate the appropriate advance placement distance (to the nearest foot) for the sign assuming a perception-reaction time of 14 seconds for the vehicle avoidance maneuver. b) A curve or turn warning sign is to be installed near a single curve with a 28 mph design speed (per ball-bank indicator) on a rural 2-lane roadway. The prevailing speed of traffic on the approaching tangent section is 62 mph. Calculate the advance placement distance upstream of the curve PC for this sign (to the nearest foot). Also indicate the appropriate sign to be used (curve or turn) and the appropriate safe advisory speed if one is to be posted for this curve.
a) A lane merge warning sign (shown below) is being installed near an entrance ramp on a freeway with operating speeds of 80 mph. Calculate the appropriate advance placement distance (to the nearest foot) for the sign assuming a perception-reaction time of 14 seconds for the vehicle avoidance maneuver.
b) A curve or turn warning sign is to be installed near a single curve with a 28 mph design speed (per ball-bank indicator) on a rural 2-lane roadway. The prevailing speed of traffic on the approaching tangent section is 62 mph. Calculate the advance placement distance upstream of the curve PC for this sign (to the nearest foot). Also indicate the appropriate sign to be used (curve or turn) and the appropriate safe advisory speed if one is to be posted for this curve.
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