Trees and Highway Safety
To minimize the severity of run-off-road collisions of vehicles with trees, departments of transportation (DOTs) commonly establish clear zones for trees and other fixed objects. The California Department of Transportation's clear zone on freeways is 30 feet (40 feet preferred) from the edge of travel way to a fixed object. These standards are based on studies that are decades old and on roadways with traffic volumes and speeds that are significantly lower than today’s California freeways. This Preliminary Investigation examines the safety of trees on controlled access freeways and conventional highways. It provides guidance on the safety of using trees and other fixed objects and examples of mitigation measures being used to reduce the severity of roadside tree collisions.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/747110603
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Supplemental Notes:
- Preliminary Investigation requested by Doug Brown, California Department of Transportation, Division of Design, Landscape Architecture.
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Corporate Authors:
CTC & Associates LLC
4805 Goldfinch Drive
Madison, WI United States 53714California Department of Transportation
Division of Research and Innovation
1227 O Street, MS-83
Sacramento, CA United States 94273-0001 - Publication Date: 2010-3-18
Language
- English
Media Info
- Media Type: Web
- Features: Tables;
- Pagination: 25p
Subject/Index Terms
- TRT Terms: Best practices; Clear zones; Crash severity; Crashes; Freeways; Highway safety; Trees
- Identifier Terms: California Department of Transportation
- Subject Areas: Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure;
Filing Info
- Accession Number: 01352229
- Record Type: Publication
- Source Agency: UC Berkeley Transportation Library
- Files: CALTRANS, TRIS, STATEDOT
- Created Date: Sep 21 2011 7:13AM