Lane Miles
Lane Miles
(OP)
I am working on calculating the lane miles within a County's jurisdiction. I have seen the definition as being the length of the center line multiplied by the number of lanes. However, I have not been able to figure out if turn lanes or suicide lanes are included in this calculation. Are these lanes omitted as they are not true "travel" lanes?
Thanks
Thanks





RE: Lane Miles
RE: Lane Miles
Suicide lanes (two way PASSING lanes) were removed from the MUTCD since the '48 or '54 edition.
I suppose you mean two-way left turn lanes? A design feature that can cut crash frequency and severity should not be called a "suicide lane."
</soapbox>
"...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: Lane Miles
RE: Lane Miles
RE: Lane Miles
RE: Lane Miles
Also, there are a lot of head-on and roll-over accidents in Mexico. Gee, I wonder why? It ain't the cartels.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Lane Miles
RE: Lane Miles
"...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: Lane Miles
RE: Lane Miles
RE: Lane Miles
RE: Lane Miles
Two-way left turn lanes are for traffic making mid-block left turns into or out of driveways, or sometimes minor side roads. It lets drivers get out of the way of through traffic, reducing rear-end crashes, and removes the pressure to accept a short gap in opposing traffic, reducing left turn crashes.
That moniker is applied because they seem to invite head-on crashes. If used properly, they don't, since people should be driving slowly or stopped if they are in the lane. However, there always seems to be some yahoo who decides he can use it to get to a left turn a half mile away.
Roadway Type Crash Rate
(All Urban Arterials) (Crashes/Million Veh Mi)
Four-lane undivided 6.75
Three-lane with center turn lane 4.96
Four-lane with median 4.02
Five-lane with center turn lane 4.01
Source: BRW, Inc., study for the Minnesota Department of Transportation, August 1998.
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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: Lane Miles
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