What does the red road surface on the highway indicate?
2 Answers
Highway navigation red sections indicate road congestion. Roads displayed with green lines generally indicate that the current traffic conditions are smooth and unobstructed. Generally, navigation maps use colors to differentiate traffic flow and road condition information for sections. Yellow sections indicate slow-moving traffic conditions, red sections represent severe congestion, yellow sections denote slow-moving traffic, green indicates smooth and unobstructed roads ahead, and gray sections indicate that the road is under construction, so please detour in time. Car navigation systems feature GPS global satellite positioning functionality, allowing drivers to know their exact location anytime while driving. Car navigation systems include automatic voice navigation, optimal path search, and other functions. They can provide driving navigation, route recommendations, information queries, AV/TV playback, and more. The field of navigation includes four general categories: land navigation, marine navigation, aeronautical navigation, and space navigation. This is also the art term used by navigators to perform navigation tasks with professional knowledge. All navigation techniques involve locating the navigator's position in comparison to known positions or patterns.
On highways, I always pay extra attention when I see red pavement because it's not just decoration—it's a warning signal set up by traffic authorities to alert drivers to sharp turns, steep slopes, or accident-prone areas ahead. I remember one late-night drive when I was fatigued and nearly missed a curve, but that red surface reminded me to slow down. In fact, this type of pavement uses high-friction materials to enhance tire grip on wet or slippery roads, preventing skidding. Experts designed it specifically to reduce accident rates, so drivers should immediately slow down upon seeing it, not just rely on navigation. Safety comes first—developing the habit of noticing these details can prevent many troubles, especially in the dark or during rain or snow.
