Which device category does a speed limit sign belong to?

• A. Traffic control device
• B. Warning device
• C. Informational device
• D. Emergency device

Answer: (A)

Speed limit signs convey a legal speed that drivers must not exceed, which is a regulatory instruction aimed at controlling how fast vehicles may travel to keep traffic moving safely. This regulatory purpose places them in the traffic control device category, as traffic control devices include signs that regulate, warn, or guide motorists. They differ from warning signs, which alert to hazards ahead, and from informational signs, which provide directions or services rather than a mandatory limit. They are not emergency devices, which are used to convey urgent actions for emergencies.