Citation

Keese CJ, Pinnell C. Highw. Res. Board bull. 1960; 235: 1-18.

Copyright

(Copyright © 1960, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

The field studies utilized the bureau of public roads' electronic traffic behavior equipment which permitted the recording of data on volume, speed, and vehicle placement for each of several freeway lanes. Studies were made on six different sections of freeways located in houston, dallas, and fort worth, texas. Statistical analyses were made to determine the effect of various types of median designs on traffic behavior. Vehicle placements were used as a criterion of traffic behavior and the variations in these placements were compared for various median designs. Studies were also made before and after the erection of a barrier fence on the 4-ft median of the gulf freeway in houston to determine the effect of this fence on traffic behavior. The analysis of the data indicated that average vehicle placements did not vary greatly, but that different type and width medians had some effect on traffic behavior. The wider medians reduced the effects of opposing flows and high volumes.