Many factors can lead to an unstable approach, which in turn, may lead to a runway excursion. While a large number of these are beyond the control of ATC, controller involvement can play an important role in contributing to safe, stable approaches and reducing the risk of runway excursions. Recognising and identifying unstable approaches, issuing proper clearances and providing timely and accurate weather information are important actions that ATC can perform to significantly reduce the risk of runway excursions.