Abstract:
THE TECHNIQUES USED WERE: (1) THE "FLOATING-CAR" METHOD, IN WHICH THE DRIVER IS INSTRUCTED TO "FLOAT" WITH TRAFFIC, AND TO PASS AS MANY CARS AS PASS HIM; AND (2) "AVERAGE" TEST RUNS, IN WHICH THE DRIVER IS INSTRUCTED TO TRAVEL AT A SPEED WHICH, IN HIS OPINION, IS REPRESENTATIVE OF THE SPEED OF ALL TRAFFIC AT THAT TIME WITHOUT REFERENCE TO KEEPING A BALANCE IN THE PASSINGS. DATA ON TRAVEL TIMES AND ON OVER-ALL SPEEDS, AS OBTAINED BY LICENSE-NUMBER RECORDING, WERE ANALYZED FOR RURAL AND URBAN TEST SECTIONS. MEAN OVERALL SPEEDS CAN BE DETERMINED WITH LOWER LIMITS OF ERROR WHEN USING THE LICENSE-MATCHING METHOD THAN WHEN USING A LIMITED NUMBER OF TEST CARS. FOR MOST HEAVILY TRAVELED SECTIONS OF STREET OR HIGHWAY, THE RECORDING OF DATA FOR A SAMPLE OF ONE OR TWO LICENSE-NUMBER ENDINGS WILL PROVIDE AN ADEQUATE SAMPLE FOR A STUDY OF AT LEAST AN HOUR'S DURATION. /AUTHOR/
Supplemental Notes:
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