Warning Road Sign (W7-3b)
Runaway Truck Ramp Distance Plaque Sign Meaning & Driving Rules
Indicates the exact distance to the next emergency runaway vehicle escape ramp.
Required Driver Action & Right-of-Way Protocol
If experiencing brake loss, guide vehicle toward the escape ramp lane immediately.
Detailed Overview & Purpose
The Runaway Truck Ramp Distance plaque (W7-3b) gives precise countdown mileage to the escape ramp so drivers with failing brakes can position their vehicles into the appropriate lane.
Key Standard & Origin: Runaway ramps can stop an 80,000-pound semi-truck traveling at 80 mph within a few hundred feet.
Where You'll Find This Sign
Positioned on long mountain descents.
Common Driver Mistakes to Avoid
Failing to move into the right lane early when experiencing brake fade.
How This Sign Appears on the DMV Knowledge & Road Test
CDL and highway safety knowledge exam question.
Legal Penalties and Moving Violations
Obstructing an emergency ramp results in heavy fines and points.
When you encounter the official Runaway Truck Ramp Distance Plaque (W7-3b) on a roadway, what is your legal duty?
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