Texas Driver's License Knowledge TestTraffic Signs and SignalsMedium
A motorist observes a diamond-shaped yellow sign with a black symbol of a truck descending a steep incline. What is the primary purpose of this sign?
- ATo warn drivers of a steep hill ahead where trucks may have difficulty maintaining speed.
- BTo inform drivers that runaway truck ramps are available ahead.
- CTo indicate a designated truck route with a downhill grade.
- DTo advise truck drivers to use lower gears for engine braking.
Show answer & explanationAnswer & explanation
Correct answer: A. To warn drivers of a steep hill ahead where trucks may have difficulty maintaining speed.
This sign is a 'Hill' or 'Steep Grade' warning sign, specifically indicating a steep downhill grade. It warns all drivers, particularly those in heavy vehicles like trucks, that they may experience difficulty controlling speed or braking on the descent.
Why the other options are wrong
- B. Runaway truck ramp signs are different and explicitly show a truck heading into a ramp.
- C. While it might be on a truck route, its primary purpose is a grade warning, not route designation.
- D. While using lower gears is good advice for a steep grade, the sign's primary purpose is a warning of the condition, not an instruction.
Steep Grade Warning Sign
A diamond-shaped yellow sign with a black symbol of a truck descending a hill, warning drivers of a steep downhill grade ahead.
- Warns of a significant downhill slope.
- Applies to all vehicles, but especially critical for heavy vehicles.
- Drivers should be prepared to use lower gears and manage speed.
Memory trick: Truck rolling down means 'Tough hill, slow down, don't be a clown'.