Reaction Distance Calculator

Calculate Reaction Distance



Formula

The formula to calculate the Reaction Distance (Dreact) is:

\[ \text{Dreact} = \frac{S \cdot 5280}{3600} \cdot \frac{T}{1000} \]

Where:

Reaction Distance Definition

Reaction distance is the distance a vehicle travels from the moment a driver perceives a need to stop until the driver actually begins to apply the brakes. It depends on the speed of the vehicle and the driver's reaction time.

Example Calculation

Let's consider an example:

Using the formula to calculate the Reaction Distance:

\[ \text{Dreact} = \frac{60 \cdot 5280}{3600} \cdot \frac{500}{1000} \approx 44 \, \text{ft} \]

This demonstrates that with a speed of 60 mph and a reaction time of 500 ms, the reaction distance would be approximately 44 feet.