What is the formula for minimum taper length for speeds of 40 MPH or less?

The formula for minimum taper length for speeds of 40 MPH or less is correctly represented by the equation L = (WS²) / 60. This formula takes into account the speed (W) in miles per hour and calculates a taper length (L) that is appropriate for safely transitioning traffic in a work zone or other temporary traffic control situations.

In this formula, the speed is squared, which acknowledges the fact that as speed increases, the distance needed for a taper also increases to maintain safety and reduce the likelihood of accidents. By dividing by 60, the equation converts the speed from miles per hour to feet per minute, providing a taper length that is directly applicable to the situation on the roadway.

Using this formula ensures that the taper length is adequate for the speed of the traffic, helping to facilitate a smoother transition for vehicles entering or exiting around construction zones. Proper calculation of taper length is crucial to protect both workers and motorists by minimizing confusion and enhancing visibility in potentially hazardous conditions.