Citation

Johnson AN, Lyon LA. Highw. Res. Board Proc. 1934; 1934.

Copyright

(Copyright © 1934, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

During the summer of 1933 the Maryland State Roads Commission in cooperation with the University of Maryland carried on a highway traffic speed survey to obtain comprehensive knowledge of the way traffic actually uses the state highways. the speed of traffic was observed at about 50 of the regular traffic census stations. at each point two observers counted and measured the speed of traffic from 9 a.m. until 4 p.m. This was done by the use of the Eno Foundation speed detector as devised by Professor C.J. Tilden of Yale University. About 500 vehicles were timed in each direction at each station. the average speed as observed from 41,000 vehicles was 35.5 miles per hour, with 87 percent of all the traffic within 45 miles per hour and 99 percent within 55 miles per hour and with only an occasional vehicle moving over 65 miles per hour. The percentage of various rate of speeds was: (1) 8 percent between 15-25 miles per hour. (2) 36 percent between 25-35 miles per hour. (3) 43 percent between 35-45 miles per hour. (4) 12 percent between 45-55 miles per hour. (5) 1 percent between 55-65 miles per hour.