Author(s):
J.C. Glennon, C. Joyner
Publication Date
1970
Abstract
An examination of the state of knowledge was conducted for the purpose of evaluating design criteria which relate truck operating characteristics on grades to the implementation of truck climbing lanes. The evaluation was specifically concerned with truck speed-distance characteristics on grades, truck weight-horsepower ratios related to climbing characteristics, and the speed reduction design criterion for initiating truck climbing lanes.|The evaluation was addressed to design criteria as presented in "A Policy on Geometric Design of Rural Highways, 1965," by the AASHO. The mayor findings were:|· The truck speed-distance curves presented in the AASHO Policy appear to be adequate for design. These curves were developed for a design vehicle with an approximate weight-horsepower ratio of 400:1, which represents a reasonable lower boundary for trucks presently on the highway.|· Based on a comparison of truck accident involvement rates, it was determined that the speed reduction criterion for initiating truck climbing lanes should be lowered from 15 mph to 10 mph.
Report Number:
134-2
Link(s):
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