Certain highway signs require drivers to obey an indicated instruction. Such signs are known as:
- Regulatory signs. ✓
- Warning signs.
- Information signs.
- Guide signs.
Answer: A. Regulatory signs.
Regulatory signs are the signs that require drivers to obey an indicated instruction.
Why this is the answer
The handbook says regulatory signs control traffic, set limits, and tell drivers what they should or should not do. It also says these signs are enforceable by law. That matches signs that require obedience to an instruction, such as a stop sign telling you to come to a complete halt. Warning signs are described as general warnings about unexpected roadway conditions, while guide signs give directional information.
Why the other answers are wrong
- B. Warning signs. — Warning signs alert you to hazards or unexpected roadway conditions; they do not set the enforceable instruction described in the question.
- C. Information signs. — Information signs point to roadway location, directions, or services rather than giving enforceable commands.
- D. Guide signs. — Guide signs give directional information, such as green signs, rather than instructions drivers must obey by law.
Remember it
Remember it by the sign's job: if it works like an enforceable command, put it in the regulatory group.