Minimum Speed 40 Sign
You may not drive slower than the posted minimum speed
Rectangle
Shape
Regulatory
Category
What to do
Maintain at least the posted minimum speed when conditions allow.
Tips
Driving too slowly can be as dangerous as speeding.
Common mistake
Driving below the minimum and impeding traffic
About regulatory signs
Regulatory signs are usually white rectangles with black or red markings, and they carry the force of law — speed limits, turn restrictions, right-of-way. Ignoring one is a traffic violation. The written test regularly checks whether you know exactly what a regulatory sign requires you to do.
Frequently asked questions
What does the Minimum Speed 40 Sign mean?
You may not drive slower than the posted minimum speed
What should you do at a Minimum Speed 40 Sign?
Maintain at least the posted minimum speed when conditions allow.
More regulatory signs
Speed Limit 35Do Not EnterDo Not PassHOV 2+ OnlyLeft Lane HOV 2+ Only (Timed)Right Lane Buses Only (Timed)Keep RightKeep Left
All 115 signs
Prefer the iPhone app? Get a timed blitz mode and a camera sign scanner too.
Download DMVPrep