What is an "escape ramp" designed for?

An escape ramp is specifically designed to help slow down vehicles that are descending a steep grade or downgrade. These ramps are critical safety features on highways, particularly for large trucks and heavy vehicles that may lose braking efficiency on steep slopes. The design typically includes a softer surface, either gravel or sand, to provide a significant reduction in speed when vehicles enter the ramp. This allows drivers to regain control and prevent potential accidents or rollovers that could occur if they are unable to slow down effectively on the main road.

While a quick exit off the highway, serving as a rest area, or allowing safe merging are important aspects of highway infrastructure, they do not accurately capture the primary purpose of an escape ramp, which is focused on enhancing safety during hazardous driving conditions caused by steep grades.