- #1
thebest99
- 33
- 0
Hi I am starting as a highway engineer. My work college has given me this to try any help woul dbe great.
A pedestrian requires to cross a two-way carriageway which is 9 metres wide to
access a railway station. Given that the road is subject to a 30mph speed limit,
wherein the V85% speed exceeds the limit by 24% and the pedestrian has good
physical and cognitive skills, calculate the maximum distance away from the crossingpoint that an approaching vehicle will need to be in order for the pedestrian to safely
complete the crossing movement. Present your methodology and the calculations
you used to determine your answer.
Calculating Safe Distances: s =u.t + ½ a.t²
v2 – u
s = v.t + s = -------------
2.µ.g
A pedestrian requires to cross a two-way carriageway which is 9 metres wide to
access a railway station. Given that the road is subject to a 30mph speed limit,
wherein the V85% speed exceeds the limit by 24% and the pedestrian has good
physical and cognitive skills, calculate the maximum distance away from the crossingpoint that an approaching vehicle will need to be in order for the pedestrian to safely
complete the crossing movement. Present your methodology and the calculations
you used to determine your answer.
Calculating Safe Distances: s =u.t + ½ a.t²
v2 – u
s = v.t + s = -------------
2.µ.g