What does a yellow speed limit sign mean?

[LaylaRose]

Yellow speed limit signs are advisory warnings designed to alert drivers to reduce speed, typically placed at appropriate locations such as curves, exits, and ramps. Below are specific details about speed limit signs: Maximum speed limit: Speed limits usually refer to the maximum allowable speed, primarily implemented to prevent safety hazards caused by speeding. On highways and expressways, minimum speed limits are also posted. Since vehicles normally travel at high speeds on these roads, significantly slower-moving vehicles can become mobile obstacles and increase the risk of rear-end collisions. Minimum speed limit: Highways and expressways have minimum speed limits, with the left lane generally requiring a higher minimum speed than the right lane. During traffic congestion, minimum speed limit regulations are temporarily suspended.