Question Escape ramps are ramps that can be used: Answers Only by automobiles, not trucks. To leave the highway and enter a two-lane highway. To stop runaway vehicles on steep downhills. Explanation Escape ramps are constructed in areas with steep downgrades to allow a means of safely stopping runaway vehicles. They consist of a long bed of loose, soft material, and sometimes an uphill slope. Take a FREE Practice Test Now This questions appears in the following tests: Oklahoma Knowledge Test Class A ,