Estimation and Comparison of Volume Delay Functions for Arterials ...

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CONTRIBUTION TO MODELING PRACTICE

• Empirically fitted VDF curves

• Compares 4 different VDF forms

• Independently validates predicted speeds

with separate data source

• Estimates VDF parameters for Freeway

HOV lanes separately

Meeting Minutes - Ohio Travel Demand Model Users Group

Travel Time Data and Reliability (Act 1) - Sam Granato

Meeting Agenda - Ohio Travel Demand Model Users Group

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CONTRIBUTION TO MODELING PRACTICE • Empirically fitted VDF curves • Compares 4 different VDF forms • Independently validates predicted speeds with separate data source • Estimates VDF parameters for Freeway HOV lanes separately 4

MAG TRAVEL DEMAND MODEL • Traditional 4-step model • 5 area types • 10 functional classifications • Existing BPR curve for VDF • Freeways • Surface streets 5

Page 1 and 2: ESTIMATION AND COMPARISON OF VOLUME
Page 3: IMPROVING THE MAG TDM THROUGH VDF C
Page 7 and 8: ESTIMATION OF VDFS • Inputs • V
Page 9 and 10: VDF FORMS AND PARAMETERS • BPR cu
Page 11 and 12: INITIAL ESTIMATION OF VDFS • Free
Page 13 and 14: INITIAL ESTIMATION OF VDFS • Majo
Page 15 and 16: DATA STRUCTURE 15
Page 17 and 18: VDF VALIDATION • Model (with new
Page 19 and 20: VALIDATION - SPEED • Model speed
Page 21 and 22: CONCLUSIONS • Improvement of mode

Estimation and Comparison of Volume Delay Functions for Arterials ...

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