contraflow system

A contraflow system is a traffic management arrangement where vehicles are directed to travel in the opposite direction to the usual flow on certain lanes or roads. It is commonly used on motorways, dual carriageways, and busy A roads, especially during roadworks, accidents, or special events, to maintain traffic flow despite lane closures or disruptions. In these systems, one or more lanes that normally carry traffic in one direction are repurposed to carry traffic in the opposite direction, often separated by physical barriers such as cones or concrete blocks for safety. Speed limits are usually reduced, and lanes tend to be narrower with no hard shoulder. Drivers must follow all signs, road markings, and barriers carefully and stay in their designated lanes. Contraflow systems can be temporary—used for hours, days, or months—or permanent, such as contraflow bus and cycle lanes in cities. They help minimize congestion, provide safe space for road workers or emergency responders, and keep traffic moving even under unusual conditions. Common hazards include closer proximity to oncoming traffic, narrow lanes, and no physical barrier on some motorways. Proper caution, reduced speed, and adherence to directions are essential for safety in contraflow systems.