Warning Road Sign (W5-3)
One Lane Bridge Ahead Sign Meaning & Driving Rules
Warns of a bridge structure with a roadway width of less than 16 feet where only one vehicle can cross at a time.
Required Driver Action & Right-of-Way Protocol
Slow to a crawl. Look across the bridge. If an oncoming vehicle is on the bridge or closer to it, wait on the approach until they clear.
Detailed Overview & Purpose
The One Lane Bridge sign (W5-3) indicates that the upcoming bridge is too narrow for two vehicles to pass simultaneously. Vehicles from opposite directions must take turns crossing the bridge.
The driver who reaches the bridge first or the vehicle facing a yield sign has right-of-way. Always yield to oncoming vehicles already on the bridge.
Key Standard & Origin: By MUTCD definition, a One Lane Bridge is any bridge with a clear road width of less than 16 feet, or less than 18 feet when commercial vehicles are present.
Where You'll Find This Sign
Remote rural roads, historic timber/iron truss bridges, and low-volume scenic crossings.
Common Driver Mistakes to Avoid
Racing to beat an oncoming vehicle across the bridge, causing a head-on standoff or collision.
How This Sign Appears on the DMV Knowledge & Road Test
Tests right-of-way protocol at single-lane structures.
Legal Penalties and Moving Violations
Failure to yield on a one-lane bridge carries reckless driving and failure-to-yield citations.
When you encounter the official One Lane Bridge Ahead (W5-3) on a roadway, what is your legal duty?
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