Final answer
The sign that tells you to slow down because you are approaching a double curve is a curve symbol with a double arrow above it.
Explanation
The sign that indicates an upcoming double curve is a curve symbol with a double arrow above it. This sign is typically placed several hundred feet before the curves to give drivers ample warning to slow down.
A double curve is a series of two adjacent curves in the roadway, typically found on hilly or mountainous terrain. These curves can be particularly challenging for drivers, as they require more steering input and slower speeds than a single curve.
The double arrow above the curve symbol serves as a reminder to drivers that they should reduce their speed and be prepared for multiple curves in quick succession.
Drivers should approach a double curve at a reduced speed, typically around 25-35 mph, depending on the posted speed limit and the conditions of the roadway.
This will allow them to navigate the curves safely and avoid losing control of their vehicle due to excessive speed. Additionally, drivers should maintain a safe following distance behind other vehicles and avoid passing during the curves, as this can increase the risk of an accident.
Overall, the sign indicating an upcoming double curve serves as an important safety measure, reminding drivers to slow down and exercise caution when approaching multiple curves in quick succession. By following these guidelines, drivers can help ensure their own safety and the safety of other motorists on the roadway.