Minimum speed signs are designed to:

Keep traffic flowing smoothly.
Inform drivers of the fastest speed they can drive.
Discourage cyclists from going too slowly.
Warn drivers about speed cameras.
Explanation

Minimum speed limit signs indicate the slowest legal speed you may drive under normal conditions, usually on highways or interstates. Their purpose is to maintain steady traffic flow and prevent slow-moving vehicles from becoming a hazard. Driving too slowly - especially on high-speed roads - can disrupt traffic and increase the risk of collisions. If no minimum speed signs are posted, try to match the flow of traffic while staying within the posted speed limit.

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