What is the primary purpose of regulatory signs?

The primary purpose of regulatory signs is to inform drivers about traffic laws and rules that must be followed to ensure the safety and efficiency of the roadway. These signs convey critical information related to required actions, speed limits, and specific rules that drivers must adhere to, such as yielding, stopping, or turning. By clearly displaying regulatory messages, these signs help maintain order on the roads and guide drivers in making safe decisions while operating their vehicles.

Other options are aimed at different functions; for example, providing driver services relates to amenities and locations for motorists, while indicating road construction points to active work areas where caution is needed. Indicating recreational facilities helps guide drivers to leisure sites but does not relate to the enforcement of traffic laws. Hence, the focus on informing about traffic laws and rules is central to the purpose of regulatory signs.