A way to reduce highway guardrail costs: machine-driving of wooden posts.

Bibliographic Details
Main Author:	Gatchell, Charles J.
Format:	Government Document Book
Language:	English
Published:	Upper Darby, Pa. : U.S. Forest Service, 1967.
Series:	United States. Northeastern Forest Experiment Station (Upper Darby, Pa.). U.S. Forest Service research paper NE- ; 81
Subjects:	Roads > Guard fences > Costs. Wood poles.

Evans: US Documents (Annex 5th floor)