What does a reverse curve mean?

[Emerson]

Reverse curve traffic warning signs are appropriately placed before two adjacent curves in opposite directions. These signs are used to warn drivers to slow down, with a safe driving speed not exceeding 60km/h. Reverse curve traffic warning signs are commonly found in mountainous areas. Below is an introduction to related content: 1. Warning signs: Serve as warnings. There are a total of 49 types. These signs warn vehicles and pedestrians to be cautious of hazardous locations. They feature a yellow background with black borders and black patterns, shaped as equilateral triangles with the apex pointing upwards. 2. Prohibition signs: Serve to prohibit certain actions. There are a total of 43 types. These signs prohibit or restrict the traffic behavior of vehicles and pedestrians. Except for a few exceptions, they have a white background, red circles, red bars, black patterns with the pattern over the bar, and are shaped as circles, octagons, or equilateral triangles with the apex pointing downwards. They are installed near sections or intersections where traffic behavior needs to be prohibited or restricted.