What is the actual height of a 2-meter height limit on highways?

[DelLily]

Highway height limits marked as 2 meters are actually a safe clearance height, with the actual height being around 2.2 meters. Therefore, slightly taller vehicles may barely pass, but this is not recommended as getting caught by traffic cameras will result in fines and penalty points. Typically, small balls are suspended from height limit gantries as safety warnings—if a vehicle touches these balls, it cannot pass. The purpose of setting height limit barriers is often due to bridges, tunnels, or underpasses ahead. More details are as follows: 1. A 2-meter height limit is only a safety clearance: Height limit barriers are commonly seen at highway entrances and exits, usually marked with the height limit (e.g., 2 meters). According to relevant data, the 2-meter limit is a safety clearance, with the actual highway height slightly higher, generally around 2.2 meters. 2. Height limit standards vary by road type: For first- and second-class highways, the clearance height of barriers should be 5 meters; for third- and fourth-class highways, it should be 4.5 meters. The primary purpose of height limit barriers is to ensure the safety of drivers and infrastructure.