Time-to-Line Crossing (TLC) is considered an important measure of driver performance. However, it is difficult to compute in real road driving. An easy-to-compute approximation that resembles accurate TLC in terms of values of minima and temporal characteristics would therefore be of benefit to research into driver behaviour. This report describes the comparison of two methods to calculate approximations of TLC with the trigonometrically computed TLC during simulated car driving. The method that divides lateral distance by the sum of the first and the second derivative of lateral distance results in values that resemble the trigonometrically computed TLC closely in absolute terms. This is because lateral velocity cannot be assumed to be constant when the car moves to either one of the lane boundaries. The second derivative of lateral distance then corrects for the change in lateral velocity in the near future. It is recommended to use this method as a reliable approximation of TLC. (A)
Samenvatting