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

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ESTIMATION OF VDFS • Volume and Speed • Flows converted to hourly flows • Volume/Capacity Ratio • Based on density • Volume and speed used to calculate density • Capacity as density at maximum flow (HCM) • Free flow speed • Average speed with v/c < 0.50 8
VDF FORMS AND PARAMETERS • BPR curve • Spiess conical function • IITPR (link delay portion only) • Akcelik • Existing MAG BPR – α = 0.10, β = 8.00 • Traditional BPR – α = 0.15, β = 4.00 • Revised trad’l BPR – α = 0.20, β = 10.00 9
Page 1 and 2: ESTIMATION AND COMPARISON OF VOLUME
Page 3 and 4: IMPROVING THE MAG TDM THROUGH VDF C
Page 5 and 6: MAG TRAVEL DEMAND MODEL • Traditi
Page 7: ESTIMATION OF VDFS • Inputs • V
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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