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. This questions appears in the following tests: Alabama Practice Test 2 Alabama Practice Test 17 Arizona Practice Test 6 Arkansas Practice Test 13 Connecticut Practice Test 21 Delaware Practice Test 9 Delaware Practice Test 20 District Of Columbia Practice Test 12 Georgia Practice Test 1 Georgia Practice Test 9 Illinois Practice Test 2 Illinois Practice Test 14 Iowa Practice Test 6 Kansas Practice Test 18 Kentucky Practice Test 2 Kentucky Practice Test 13 Maine Practice Test 3 Maryland Practice Test 4 Mississippi Practice Test 4 Nebraska Practice Test 6 Nebraska Practice Test 16 South Dakota Practice Test 22 Tennessee Practice Test 6 Wisconsin Practice Test 8 Wisconsin Practice Test 20 Wyoming Practice Test 5 Wyoming Practice Test 11 California Practice Test 14