TRIS Online Record

Title	TRUCK SPEEDS ALONG DOWNGRADES IN CALIFORNIA
Accession No	00469496
Authors	Tom, GKJ; Elcock, K L
Corp. Authors / Publisher	California Department of Transportation ; Federal Highway Administration
Publication Date	19880200
Description	109 p.
Abstract	The speeds of 4,258 trucks were measured on downgrades along rural freeways and expressways in California during 1982, 1983, 1984, 1985, 1986 and 1987. The speeds of trucks were measured at eleven grades with lengths ranging from about 1.4 miles to 11.8 miles and average rates of downgrade ranging from about 3.5% to 7.1%. The results did not provide any definite relationships between truck speeds and rate of downgrade from which downgrade truck speeds can be obtained for any given situation. Each location has its unique set of characteristics which might influence truck speeds on downgrades. Therefore, the information in this report would be helpful for planning and designing freeways at areas where there will be downgrades with similar characteristics.
TRT Terms	Downgrades (Roads) ; Expressways ; Freeways ; Highway design ; Highway planning ; Rural areas ; Speed ; Speed measurement ; Trucks
Other Terms	Downgrade; Freeway design; Freeway planning
Subject Areas	H21 FACILITIES DESIGN; H55 TRAFFIC FLOW, CAPACITY AND MEASUREMENTS; I21 Planning of Transport Infrastructure
Contract Number	F82TO23
Report Number	FHWA/CA/TO-88/1; 55-623178
Availability	National Technical Information Service Order Number: PB89-101919/AS
TRIS Files	HRIS
Database	TRIS Online

TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.