Citation

Tarnoff PJ, Kittelson WK. Transp. Res. Rec. 1978; 682: 66-68.

Copyright

(Copyright © 1978, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

This paper discusses an approach to the derivation of vehicle speed profiles from point surveillance data; however, the limitations of the available data precluded a comprehensive evaluation of the procedure. All indications are that this process can be successfully used for freeway applications; therefore, it is recommended that further validation of the process be pursued. This validation is necessary because of the possible errors introduced by variations in vehicle lengths, difficulties in estimating speed propagation rates, and lane-changing maneuvers between the detectors. Currently, variations in vehicle length are compensated for by smoothing the input data to reduce the impact on speed processing, but this also introduces errors in the computation process.