What is the recommended length for a downstream taper per lane?

The recommended length for a downstream taper per lane falls within the 50 to 100 feet range. This distance is based on standard traffic control practices that consider the dynamics of vehicular movement, allowing sufficient space for drivers to safely merge back into a regular traffic flow after encountering a work zone or a change in roadway conditions.

A taper is crucial in guiding drivers and providing a transition from a normal lane width to a narrower width or the end of a traffic control area. A taper that is too short may not provide sufficient warning time, while one that is excessively long may confuse drivers regarding the actual work zone ahead.

The choice of a downstream taper length reflects the need for safety and efficiency, ensuring that vehicles can adapt to the changes in road configuration without abrupt maneuvers. Understanding these guidelines plays a vital role in effective traffic management and helps in minimizing accidents in construction or maintenance zones.