Description
Item Description:Vol. 1 prepared by Systems Technology, Inc., under contract DOT-FH-11-8824.
Vol. 2 prepared by Human Factors Research, Inc., under contract DOT-FH-11-8824.
"November 1977."
"Report no. FHWA-RD-77-165"--Vol. 1.
"Report no. FHWA-RD-77-166"--Vol. 2.
Physical Description:2 v. : ill. ; 28 cm.
Bibliography:Includes bibliographical references.