A stop bar is a row of red lights in the pavement of a runway or taxiway at specific points where airplanes and/or vehicles must stop. It shows pilots and vehicle drivers where they must wait before crossing or entering a runway. While the stop bar is illuminated, airplanes and vehicles must not proceed. If necessary, air traffic control can turn off the stop bar when it is safe to proceed.
In the ‘Stop bar 24 hours’ concept, these lights are used throughout the day and in all weather conditions to protect the runways. An initial analysis by Schiphol and its partners suggests that this measure could be highly effective in reducing the risk of accidents on runways. Therefore, further research is being conducted to assess the feasibility of implementing this measure.