What type of warning sign provides information about a change in road width?

The correct answer identifies a specific category of warning signs that is dedicated to informing drivers about changes in the road’s width. Road width signs are designed to alert motorists that the road may narrow ahead, which is crucial for safe navigation and preventing accidents. This type of sign is especially important in areas where road construction or geographical constraints may alter the width of the roadway, requiring drivers to adjust their speed and positioning.

Road width signs play a critical role in enhancing road safety by proactively communicating potential hazards related to a change in the driving environment. This foresight allows drivers to be more vigilant and prepared as they approach narrower road sections, contributing to overall roadway safety. Other types of signs mentioned, such as traffic control device signs, road obstacle signs, and regulatory signs, serve different functions and do not specifically convey information about a change in road width.