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Publication Number: FHWA-HRT-08-019
Date: November 2007

Development of a Driver Vehicle Module (DVM) for the Interactive Highway Safety Design Model (IHSDM)

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APPENDIX A - DRIVER/VEHICLE CONFIGURATION PARAMETERS

Configuration Vehicle Driver Type Cuts Curve?
Deterministic nominal-center/Taurus Passenger car Nominal N
Deterministic nominal-cutcurve/Taurus Passenger car Nominal Y
Deterministic aggressive-center/Taurus Passenger car Aggressive N
Deterministic aggressive-cutcurve/Taurus Passenger car Aggressive Y
Deterministic nominal-center/truck Truck Nominal N
Deterministic nominal-cutcurve/truck Truck Nominal Y
Deterministic aggressive-center/truck Truck Aggressive N
Deterministic aggressive-cutcurve/truck Truck Aggressive Y
Stochastic nominal-center/Taurus Passenger car Nominal N
Stochastic nominal-cutcurve/Taurus Passenger car Nominal Y
Stochastic aggressive-center/Taurus Passenger car Aggressive N
Stochastic aggressive-cutcurve/Taurus Passenger car Aggressive Y
Stochastic nominal-center/truck Truck Nominal N
Stochastic nominal-cutcurve/truck Truck Nominal Y
Stochastic aggressive-center/truck Truck Aggressive N
Stochastic aggressive-cutcurve/truck Truck Aggressive Y

where:

"Nominal" approximates the average response characteristics of the test drivers.

"Aggressive" approximates the 85th percentile driver.

Not cutting the curve means the driver attempts to maintain lane center in horizontal curves.

Cutting the curve means the driver tracks to the inside of horizontal curves.


[1] Note: Lateral acceleration indicates acceleration in the plane of the earth, whereas Friction Ratio Y indicates acceleration in the plane of the road. Therefore, lateral acceleration and friction ratio may differ substantially when the road is superelevated.

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