What is the standard width of a road surface?
1 Answers
For multi-lane highways above Class III, the width of each motor vehicle lane is 3.5 to 3.75 meters. Below are the specific details: 1. Median strip: There is no uniform standard for the central median strip, as it is designed according to local conditions. A simple cement central median strip is one meter wide (the distance between the two white solid lines on both sides of the central median strip). For central green median strips, there is no unified standard for width, and some "image projects" can have median strips as wide as several tens of meters. 2. Sidewalk: Urban arterial roads must have sidewalks. The width of sidewalks on urban arterial roads is calculated based on actual pedestrian flow, generally at least 3 meters wide, with wider ones reaching 15-20 meters. 3. Lane: The width of each lane on urban roads is 3.5 meters. The width of each diversion lane at intersections is 2.3-2.5 meters. The width of each lane on trunk roads (including expressways) is 3.75 meters, and the shoulder (emergency stopping lane on expressways) is 1.5-2.5 meters. Lane width refers to the width required for a single line of vehicles to travel safely and comfortably, including the external width of the design vehicle and the necessary clearance for passing, overtaking, or parallel driving.
