What are minimum speed signs designed to do?

Minimum speed signs are specifically intended to maintain a consistent flow of traffic on certain roadways. By establishing a lower threshold for speed, these signs help to prevent vehicles from traveling too slowly, which can cause disruption and unsafe conditions for other drivers. When vehicles adhere to the minimum speed, it promotes a more uniform traffic pattern, reducing the likelihood of accidents caused by sudden braking or erratic driving behaviors. This is especially crucial on highways and faster roadways where slower-moving vehicles can significantly impede the overall flow of traffic, creating potential hazards for all road users.

The other options address different functions. Warning signs indicate dangers ahead, while signs for heavy vehicles focus on specific regulations for larger trucks. Signals regarding pedestrians are aimed at highlighting areas where foot traffic is prevalent, particularly in urban settings. While all these elements are important for road safety and traffic management, the primary role of minimum speed signs is to ensure that traffic continues to move efficiently and safely.