Appendix B to Part 234—Alternate Methods of Protection Under 49 CFR 234.105(<span class="standard">c</span>), 234.106, and 234.107(<span class="standard">c</span>)
Alternate Methods of Protection Under 49 CFR 234.105(<span class="standard">c</span>), 234.106, and 234.107(<span class="standard">c</span>)
Appendix B to Part 234—Alternate Methods of Protection Under 49 CFR 234.105(c), 234.106, and 234.107(c)
[This is a summary—see body of text for complete requirements]
Flagger for each direction of traffic
Police officer present
Flagger present, but not one for each direction of traffic
No flagger/no police
False Activation
Normal Speed
Normal Speed
Proceed with caution—maximum speed of 15 mph
Proceed with caution—maximum speed of 15 mph.
Partial Activation*
Normal Speed
Normal Speed
Proceed with caution—maximum speed of 15 mph
Proceed with caution—maximum speed of 15 mph.
Activation Failure**
Normal Speed
Normal Speed
Proceed with caution—maximum speed of 15 mph
Stop: Crewmember flag traffic and reboard.
*Partial activation—full warning not given.
Non-gated crossing with one pair of lights designed to flash alternatively, one light does not work (and back-lights from other side not visible).
Gated crossing—gate arm not horizontal; or any portion of a gate arm is missing if that portion had held a gate arm flashing light.
**Activitation failure includes—if more than 50% of the flashing lights on any approach lane not functioning; or if an approach lane has two or more pairs of flashing lights, there is not at least one pair operating as intended.