On the Bugey, on the Hauteville plateau and the Valromey peaks, winter driving conditions are difficult above 700m, the altitude of the rain / snow limit.
On the heights of Oyonnax, winter traffic conditions are difficult due to the presence of ice on the roads. Above 800 m, special equipment is recommended. The sidewalks are being treated.
Winter traffic conditions are normal in the rest of the departmental road network.