Description
Item Description:"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."
Performed by the Texas Transportation Institute under NCHRP project 1-20.
"December 1983."
Physical Description:28 pages : illustrations, charts ; 28 cm.
Bibliography:Bibliography: pages 27-28.
ISBN:0309037107 :
ISSN:0077-5614 ;