What is the width of a road lane?

[LukasMarie]

The width of a lane on urban roads is 3.5 meters, while on highways it is 3.75 meters. Below is an introduction to the different lane widths on highways and the classification of road grades: Different lane widths on highways: When designing lanes, factors such as the external width of vehicles, the additional width needed for passing, overtaking, or driving side by side must be considered. According to China's highway standards, the total width of a four-lane bidirectional highway is 7.5 meters, a six-lane bidirectional highway is 11.25 meters, and an eight-lane bidirectional highway is 15 meters. During daily driving, it is advisable to maintain steady driving within a single lane to avoid safety hazards caused by frequent lane changes. Road grades: Roads are generally classified into expressways, first-class roads, second-class roads, third-class roads, and fourth-class roads.