Home › CDL Practice Tests › General Knowledge Questions › Question 100
Why should you be cautious about trusting a posted clearance height at an underpass?
- A.Posted signs are always higher than the real clearance
- B.Repaving can reduce the actual clearance, and loads can shift or bounce, so posted heights may no longer be accurate
- C.Clearance only matters for passenger cars
- D.Ice on the road raises the truck but signs account for it
Correct answer
B. Repaving can reduce the actual clearance, and loads can shift or bounce, so posted heights may no longer be accurate
Why
Resurfacing raises the road surface under old bridges, so the posted number may overstate the room you actually have. Knowing your own vehicle's exact height and treating signs with caution prevents bridge strikes.
Manual topic: Safe Driving - Special Attention Items · From the General Knowledge practice bank (GK-100).