Which of the following signs must be complied with by drivers to avoid penalties or crashes?

Regulatory signs are critical to maintaining order and safety on the roads. They convey laws and regulations that drivers must adhere to in order to ensure both their safety and the safety of others. These signs often include speed limits, no parking signs, and stop signs, among others. Adhering to these regulations is mandatory; failure to comply can lead to penalties, such as fines or points against a driver's license, as well as increase the risk of accidents.

While warning signs serve to inform drivers about potential hazards ahead and informative or guide signs provide directions and information, these do not carry the same legal implications as regulatory signs. Traffic control signs encompass both regulatory and warning signs but still do not replace compliance with specific regulatory signs that explicitly dictate the rules of the road. Therefore, understanding and following regulatory signs is vital for safe driving practices.