You may drive around a railroad crossing gate that is being lowered:

If gates are down at a railroad crossing, stay in place and do not try to cross the tracks until after the gates have been raised. It is against the law to drive around railroad crossing gates.

• Under no circumstances.
• If the gate is malfunctioning.
• If you have plenty of time to cross before the gate is fully lowered.
• If there is a shoulder to the right of the gate.