a) The driver of a vehicle travelling near the design speed is expected to see a minimum
Question:
a) The driver of a vehicle travelling near the design speed is expected to see a minimum length of 160m of a 2-lane paved highway ahead as per the requirements of the Ghana Highway Authority Road Design Guide to enable him stop safely before reaching a hazard on the roadway. At a braking distance of 25m, what should be the driver’s reaction time in seconds to meet the aforesaid requirements?
b) Where on the road and how will you as a Highway Design Engineer ensure that the driver of a vehicle always has adequate distance to stop whenever a hazard is encountered? (
c) A curve is required to connect an entry grade of +3% and an exit grade of +2% to satisfy a sight distance requirement of 250m. Determine the minimum length of the curve assuming an average driver eye height and hazard is at the level of the carriageway.