On 14 November 2019, a Boeing 737 was instructed was instructed to stop its night takeoff from Lyon at a low speed when the controller saw snow clearance vehicles entering the runway ahead. This vehicle group had been cleared to enter the active runway by the ground controller without any coordination with the runway controller and only the monitoring of surface movement radar and visual external scanning had removed the risk of a more serious consequence arising from the permitted incursion. The airport operator’s snow response plan was found not be specific to their airport and consequently of limited practical value.