Citation

Polus A, Craus J, Grinberg I. Transp. Res. Rec. 1981; 806: 28-33.

Copyright

(Copyright © 1981, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

A summary is presented of one phase of a multiphase study that deals with heavy-vehicle flow on downgrades and is concerned with geometric and flow warrants for the inclusion of truck climbing lanes on two-lane rural highways. One criterion for the introduction of climbing lanes on two-lane rural highways for both upgrade and downgrade directions is based on the level-of-service concept; another criterion is based on speed reduction. A suggested set of volume graphs is devised for the level-of-service criterion, and extensive use is made of a previously developed model for truck equivalency factors. A scheme for the relative location and signing of climbing lanes is also presented.