French roads have a variable speed limit that depends on weather conditions. In dry weather rural 2- or 3-lane roads are limited to 90 km/h, 4-lane expressways (in rural areas) 110 km/h, and highways (in rural areas, when classified as motorway) 130 km/h. When raining, the limits are lowered to (respectively) 80, 100, and 110 km/h. Urban speed limit of 50 km/h is unaffected by weather. The general speed limit is lowered to 50 km/h on all roads in the fog or other low-visibility conditions if visibility is under 50 meters.