00227999

Component

https://onlinepubs.trb.or...bproceedings/13/13-024.pdf

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 PER CENT OF ALL THE TRAFFIC WITHIN 45 MILES PER HOUR AND 99 PER CENT 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 PER CENT BETWEEN 15-25 MILES PER HOUR. (2) 36 PER CENT BETWEEN 25-35 MILES PER HOUR. (3) 43 PER CENT BETWEEN 35-45 MILES PER HOUR. (4) 12 PER CENT BETWEEN 45-55 MILES PER HOUR. (5) 1 PER CENT BETWEEN 55-65 MILES PER HOUR. /AUTHOR/

Vol 13, ParT I, PP 351-362, 3 FIG, 1 TAB; part of Report of Committee on Highway Traffic. 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.

01490412

1934

Highway Research Board Proceedings

Digital/other

Speed measurement; Studies; Traffic speed; Traffic surveys; Vehicles

Highways; Operations and Traffic Management; Vehicles and Equipment

TRIS, TRB

Aug 29 1971 12:00AM

• ALCOHOL AND MOTOR VEHICLE DRIVERS
• AN EXPERIMENTAL ROAD OF CEMENT BOUND MACADAM
• ANALYSIS OF ROAD COST ON THE STATE HIGHWAYS OF WORCESTER COUNTY, MASSACHUSETTS
• APPLICATION OF EQUATION FOR ANNUAL ROAD COSTS
• COEFFICIENT OF FRICTION BETWEEN TIRES AND ROAD SURFACES
• CRACK CONTROL IN CONCRETE BASES FOR SHEET ASPHALT PAVEMENT
• DETERMINATION OF TIME SAVED BY VEHICLES USING THE NEW JERSEY HIGH LEVEL VIADUCT
• FURTHER TRACTIVE RESISTANCE TESTS WITH A GAS ELECTRIC DRIVE AUTOMOBILE
• GRAVEL TYPE STABILIZED SURFACES FOR SECONDARY ROADS
• HIGHWAY LIGHTING RESEARCH
• INTANGIBLE ECONOMICS OF HIGHWAY TRANSPORTATION
• LIQUID BITUMINOUS MATERIALS FOR PLANT MIXED SURFACES
• MAKING AND USING THE TRAFFIC CENSUS
• MOTOR VEHICLE ACCIDENTS AS REFLECTED BY PSYCHOLOGICAL TESTS AND REACTION METER
• PROGRESS REPORT ON THE REACTION OF CALCIUM CHLORIDE ON PORTLAND CEMENT
• REPORT OF COMMITTEE ON MAINTENANCE - TREATMENT OF ICY PAVEMENTS
• REPORT OF JOINT COMMITTEE ON ROADSIDE DEVELOPMENT
• REPORT OF PROJECT COMMITTEE ON FILLERS AND CUSHION COURSES FOR BRICK AND BLOCK PAVEMENTS
• REPORT OF SUBCOMMITTEE ON MAINTENANCE OF CONCRETE PAVEMENT CRACKS AND EXPANSION JOINTS
• RULES OF THE ROAD IN THEORY AND PRACTICE
• SKIDDING CHARACTERISTICS OF ROAD SURFACES
• THE ECONOMY OF HIGHWAY IMPROVEMENTS
• THE EFFECT OF CONTROL METHODS ON TRAFFIC FLOW-TRAFFIC MOVEMENTS AT SEVENTEENTH STREET AND CONSTITUTION AVENUE IN WASHINGTON, D.C.
• THE ENGINEERING VALUATION OF HIGHWAY SYSTEMS - A PROBLEM IN PUBLIC UTILITIES VALUATION
• THE PHOTOGRAPHIC METHOD OF STUDYING TRAFFIC BEHAVIOR
• THE TAXATION OF MOTOR VEHICLES IN 1932
• WEATHERING TESTS ON CONCRETE