mikesbytes wrote:Straight line reaction and braking distance is a documented metric. Using this example, how is the required stopping distance on a piece of road determined?
Going from memory here, I will look it up when i am back at work.
Reaction time is set depending on type of road and surrounding either 1.5 or 2.5 seconds), then the stopping distance looks at type of road surface, vehicle type and weight, rate of deceleration then there is a slope (grade) of road factor. Once you have that distance then you need to calculate that distance linearly to the road geometry (which is generally curved) from the drivers eye height (varies between states of aust but between 1.1m and 1.2m from the ground) and eye offset from lane (usually 1.5m) to the linear object target which in this example is 0.2m (but can vary depending on what is calculated : object height, lane line height 0.0m, tail light which is 0.6m or vehicle which is eye height and all these values change the calculated distances).
Does that cover what you are asking?