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TFHRC Home > Safety > Safety Publications > FHWA-HRT-08-019 > Appendix A
| 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.
FHWA-HRT-08-019
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