Regulatory Road Sign (R2-2P)
Truck Speed Limit Plaque Sign Meaning & Driving Rules
Specifies a lower maximum legal speed limit for commercial trucks, tractor-trailers, and heavy vehicles.
Required Driver Action & Right-of-Way Protocol
Commercial drivers and vehicles towing trailers must obey the lower posted truck limit.
Detailed Overview & Purpose
The Truck Speed Limit plaque (R2-2P) is mounted below standard speed limit signs in states with split speed limits. Because heavy commercial trucks require significantly longer stopping distances, their maximum allowable speed is restricted.
Key Standard & Origin: At 60 mph, a fully loaded 80,000-pound semi-truck requires nearly 400 feet to stop — almost double a passenger car.
Where You'll Find This Sign
Interstate highways, mountain corridors, and freight bypass routes in states with differential speed laws.
Common Driver Mistakes to Avoid
Commercial drivers exceeding truck limits to match faster passenger car flow.
How This Sign Appears on the DMV Knowledge & Road Test
Essential CDL knowledge question regarding differential highway speed limits.
Legal Penalties and Moving Violations
Commercial speeding violations carry severe carrier CSA points and fines.
When you encounter the official Truck Speed Limit Plaque (R2-2P) on a roadway, what is your legal duty?
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