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Calibration Report for the TPB Travel Forecasting Model, Version ...

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<strong>Calibration</strong> <strong>Report</strong> <strong>for</strong> <strong>the</strong> <strong>TPB</strong> <strong>Travel</strong> <strong>Forecasting</strong> <strong>Model</strong>, <strong>Version</strong> 2.3<br />

List of Equations<br />

Equation 1 Income ratio equation ............................................................................................................................. 3‐5<br />

Equation 2 Percent of total trips productions that are I‐X ...................................................................................... 4‐10<br />

Equation 3 Trip Attraction by Income Level ............................................................................................................ 4‐21<br />

Equation 4 Trip generation of commercial vehicle trips .......................................................................................... 4‐25<br />

Equation 5 Composite time ....................................................................................................................................... 5‐3<br />

Equation 6 Friction factor calibration ........................................................................................................................ 5‐6<br />

Equation 7 True utility of an alternative expressed as <strong>the</strong> sum of deterministic utility and an error term ............ 6‐10<br />

Equation 8 Systematic utility of using alternative/mode i <strong>for</strong> individual t .............................................................. 6‐11<br />

Equation 9 Systematic utility of auto and bus in a simple binary logit mode choice model ................................... 6‐11<br />

Equation 10 Probability of choosing alternative i over alternatives j <strong>for</strong> a multinomial logit mode choice model 6‐11<br />

Equation 11 Equation <strong>for</strong> calculating <strong>the</strong> top‐level equivalent value of a nesting constant ................................... 6‐26<br />

Equation 12 Equation <strong>for</strong> calculating <strong>the</strong> implied minutes of impedance of a top‐level nesting constant ............. 6‐26<br />

Equation 13 Queuing delay function (QDF): Sigmoid .............................................................................................. 8‐11<br />

Equation 14 Akçelik curve........................................................................................................................................ 8‐12<br />

Equation 15 Akçelik Delay Function (HCM 2000) .................................................................................................... 8‐13<br />

Equation 16 Conical VDF function (Spiess 1990) ..................................................................................................... 8‐13<br />

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