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Flashing Yellow Arrow Left-Turn Signal

Flashing Yellow Arrow Left-turn Signal
Department of Transportation

Flashing Yellow Arrow Left-Turn Signal

A flashing yellow arrow signal is a type of signal placed over the left-turn lane at an intersection. It provides a safer, more efficient left turn for motorists, and will replace the flashing red left-turn signals that are common throughout Michigan.

Remember: A flashing yellow arrow means turn with caution.

Flashing Yellow Arrow Left-Turn Signal Brochure


Safer - A national study demonstrated that drivers made fewer mistakes with the flashing yellow arrow signals than with traditional left-turn signals.

Efficient - Motorists have more opportunities to make a left turn with the flashing yellow left-turn arrow than with the traditional yielding left-turn signals, which reduces delays and keeps traffic moving. It also provides additional traffic management flexibility.

Consistent - Motorists will see the same signals in every state.

Design & Function

When illuminated, the flashing yellow arrow indicates that motorists may proceed with caution and turn left after yielding to oncoming traffic and pedestrians.

After it flashes, the flashing yellow arrow becomes a steady (non-flashing) yellow or green arrow. Motorists should treat the steady yellow arrow just like a standard yellow light and be prepared to stop or safely complete the left turn.

A green arrow indicates that it is safe to turn left because oncoming traffic has stopped. 

The flashing yellow arrow provides a more direct message to motorists and reduces confusion.