Theoretical Analysis of Delay in Braking Operation When Drivers Looking Away from the Road Ahead

When a driver looks at a display screen for a navigation system or the like, they are not able to pay adequate attention in front of them. By proposing a calculation method, we stochastically analyze how much noticing of danger ahead is delayed and how much the braking operation is delayed. The validity of this method is verified by the experimental data. We reveal that it is possible to quantitatively infer the delay in the braking operation due to the driver looking at the display screen by comparing the calculated results with the data for when the driver is not looking away.