Clear Zone Question
Clear Zone Question
(OP)
Is there a ref. on clear zones for curbed sections? I have looked and looked but cannot find any. Your help is greatly appreciated.
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RE: Clear Zone Question
RE: Clear Zone Question
RE: Clear Zone Question
Regards
VOD
RE: Clear Zone Question
RE: Clear Zone Question
VOD
RE: Clear Zone Question
If possible, the normal clear zone should be provided.
Clear zones will not redirect a vehicle, except for low speed, low angles impacts. The Greeen Book lists offsets for street furniture, luminaires, etc, but this is mostly so truck mirrors don't hit them, and people can open car doors.
Curbs should not be used on higher speed roads. Vehicles ten to vault at higher speeds.
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"Come to think of it, there are already a million monkeys typing on a million typewriters, and the Usenet is NOTHING like Shakespeare.
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RE: Clear Zone Question
RE: Clear Zone Question
RE: Clear Zone Question
It's a bit complicated to go into detail here - depends on curb type, guiderail type, distance between rail and curb, etc. See the AASHTO Roadside Design Guide or your state DOT/MOT's design manual for more info.
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"Come to think of it, there are already a million monkeys typing on a million typewriters, and the Usenet is NOTHING like Shakespeare.
Blair Houghton
RE: Clear Zone Question
It is also discussed in Chapter 4 of AASHTO "Green Book" under Horizontal Clearance to Obstructions.