Question This sign means: Answers Trucks entering. Truck exit only. Steep downgrade ahead. Explanation This sign warns that a steep downgrade is ahead on the road. Drivers should check their brakes. Take a FREE Practice Test Now This questions appears in the following tests: Georgia Practice Test Alabama Practice Test Illinois Practice Test Kentucky Practice Test Maine Practice Test Mississippi Practice Test Maryland Practice Test Wyoming Practice Test Arizona Practice Test Tennessee Practice Test Nebraska Practice Test Iowa Practice Test Wisconsin Practice Test Delaware Practice Test District Of Columbia Practice Test Arkansas Practice Test California Practice Test Kansas Practice Test Connecticut Practice Test South Dakota Practice Test