85th percentile speed and speed reduction
85th percentile speed and speed reduction
(OP)
Hi guys,
I was doing a speed data assessment along a highway whose speed is 100km/h. I calculated the 85 percentile along three locations I setup to collect the speed data to be about 104-105km/h with the mean being 99-100km/h. We were looking at lowering the speed to 80km/h due to a lot of pedestrians crossing the highway and we have had pedestrians killed at least 5 times due to them crossing the highway. The highway runs through an indian reserve. There are also a high number of accesses on to the highway, something like one access per 300m, which is quite high.
Based on the data I collected it seems like theirs moderate compliance with the speed limit and lowering the speed limit to 80km/h wouldn't ensure that their would be compliance and as it stands the existing speed limit is satisfactory. Am I correct in making this assumption?
I was doing a speed data assessment along a highway whose speed is 100km/h. I calculated the 85 percentile along three locations I setup to collect the speed data to be about 104-105km/h with the mean being 99-100km/h. We were looking at lowering the speed to 80km/h due to a lot of pedestrians crossing the highway and we have had pedestrians killed at least 5 times due to them crossing the highway. The highway runs through an indian reserve. There are also a high number of accesses on to the highway, something like one access per 300m, which is quite high.
Based on the data I collected it seems like theirs moderate compliance with the speed limit and lowering the speed limit to 80km/h wouldn't ensure that their would be compliance and as it stands the existing speed limit is satisfactory. Am I correct in making this assumption?





RE: 85th percentile speed and speed reduction
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"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928
"I'm searching for the questions, so my answers will make sense." - Stephen Brust
RE: 85th percentile speed and speed reduction
I hope this helps--
RE: 85th percentile speed and speed reduction
RE: 85th percentile speed and speed reduction
"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928
"I'm searching for the questions, so my answers will make sense." - Stephen Brust
RE: 85th percentile speed and speed reduction