Citation

Courage KG, Bissell HH. Highw. Res. Rec. 1972; 398: 2-11.

Copyright

(Copyright © 1972, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

A traffic survey system has been developed that collects data on a digital tape for off-line anaylysis by a general-purpose digital computer. Examples of two methods that have actually been conducted in the field are presented. One example involves the use of the recorder in a moving vehicle to collect data on time, distance, and approaching vehicles passed on a freeway facility. These data are used to develop speed, flow, and density contours; delay contours; speed and delay peak-hour profiles; isochronal travel time plots; close following patterns; and bottleneck flow density relationships. The second example involves stationing the recorder at the side of the roadway and collecting speed, volume, and headway data through the use of road-tube detectors. These data are used to compute speeding, tailgating, and turbulence indexes. Other traffic engineering study applications are being developed.

KEYWORDS:
Car following; Contours; Digital computers; Graphics; Headways; Information processing; Magnetic tapes; Peak hour traffic; Tape recorders; Traffic delays; Traffic flow; Traffic speed; Traffic volume; Turbulence; Close following

Language: en