00203344

Component

http://onlinepubs.trb.org...rbbulletin/235/235-001.pdf

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. /AUTHOR/

No 235, pp 1-18, 12 FIG, 6 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01410627

18p

1960

Highway Research Board Bulletin

Digital/other

Before and after studies; Design; Field studies; Freeways; Median barriers; Medians; Recording; Speed; Statistical analysis; Traffic; Traffic lanes; Traffic signal hardware; Traffic volume; Vehicular phase

Data and Information Technology; Design; Highways; Operations and Traffic Management

TRIS, TRB

Aug 19 1994 12:00AM

• A STUDY OF FREEWAY TRAFFIC OPERATION
• TRAFFIC BEHAVIOR AND ON-RAMP DESIGN
• TRAFFIC BEHAVIOR ON AN URBAN EXPRESSWAY