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Travtek Evaluation Modeling Study
  • Published Date:
    1996-03-01
  • Language:
    English
Filetype[PDF-3.40 MB]


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  • Abstract:
    THE FOLLOWING REPORT DESCRIBES A MODELING STUDY THAT WAS PERFORMED TO EXTRAPOLATE, FROM THE TRAVTEK OPERATIONAL TEST DATA, A SET OF SYSTEM WIDE BENEFITS AND PERFORMANCE VALUES FOR A WIDER-SCALE DEPLOYMENT OF A TRAVTEK-LIKE SYSTEM. IN THE FIRST PART OF THE MODELING STUDY, THE INTEGRATION SIMULATION MODEL WAS ENHANCED AND CALIBRATED TO PRODUCE A MODEL WHOSE DRIVER AND IN-VEHICLE SYSTEM PARAMETERS WERE REPRESENTATIVE OF THE BEHAVIOR THAT WAS QUANTIFIED BY VARIOUS TRAVTEK FIELD TESTS IN ORLANDO, FLORIDA. IN THE SECOND PART OF THE STUDY, A CODED TRAFFIC NETWORK WAS CREATED WITH PROPERTIES THAT WERE REPRESENTATIVE OF THE TRAFFIC CONDITIONS OBSERVED IN ORLANDO DURING THE COURSE OF THE TRAVTEK OPERATIONAL FIELD TEST. NINE MEASURES OF PERFORMANCE (MOP?S) OF THE TRAVTEK SYSTEM WERE THEN ESTIMATED USING THE MODEL: THE TOTAL TRIP TRAVEL TIME; THE TOTAL DISTANCE TRAVELED; THE NUMBER OF STOPS INCURRED; AND THE NUMBER OF MISSED TURNS EXPERIENCED; AS WELL AS THE AVERAGE ESTIMATED FUEL CONSUMPTION; VEHICLE EMISSIONS OF HYDROCARBON (HC); CARBON MONOXIDE (CO) AND OXIDES OF NITROGEN (NOX) PER VEHICLE; AND THE EXPECTED ACCIDENT RISK.



    THE SIMULATED ORLANDO TRAVTEK NETWORK CONSISTED OF 2,670 UNI-DIRECTIONAL LINKS, 87 ZONES, 49 TRAFFIC SIGNALS AND 783 LANE-KM. DURING A TYPICAL MODELING RUN, OF THE PM PEAK, 62,899 INDIVIDUAL VEHICLES WERE TRACED THROUGH A TOTAL OF 679,111 VEH-KM OR 11,882 VEH-H. THE LEVEL OF MARKET PENETRATION (LMP) WAS FOUND TO IMPROVE MOST OF THE NINE MOP'S BY UP TO 12, 5, 32, 37, 13,

    16, AND 7 PERCENT FOR THE AVERAGE TRIP DURATION, AVERAGE TRIP LENGTH, NUMBER OF VEHICLE STOPS, NUMBER OF WRONG TURN MANEUVERS, LEVEL OF FUEL CONSUMPTION, HC AND CO EMISSIONS, RESPECTIVELY.

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