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Must drivers use turn signals in roundabouts?

Question: Are drivers required to use turn signals when entering or exiting a roundabout? With a newly constructed roundabout very recently opened in town, I have not once observed a turn signal used. What is the law?

Answer: This is a great question as we are seeing more roundabouts in the state of Minnesota.

Minnesota state law says that a signal of intention to turn right or left shall be given continuously during not less than the last 100 feet traveled by the vehicle before turning. A person whose vehicle is exiting a roundabout is exempt from this subdivision. So per state law a signal is not required once in a roundabout.

I would say that entering a roundabout could or would require a signal, depending on how it is constructed.

My recommendation would be to use your signal anytime you change lanes or direction, to alert others of your intention.

The Minnesota Department of Transportation says that roundabouts are safer and produce better traffic flow. Roundabouts show an 89 percent decrease in fatal crashes, a 74 percent decrease in life-altering injury crashes, and a 39 percent decrease in all crashes. They also handle high levels of traffic with less delay than most stop signs or signals. The entry curves slow traffic so entering and exiting are easier and more efficient.

For additional information about roundabouts, visit MNDOT's website at: www.dot.state.mn.us/roundabouts/

A portion of state statutes were used with permission from the Office of the Revisor of Statutes. If you have any questions concerning traffic related laws or issues in Minnesota, send your questions to Trp. Jesse Grabow — Minnesota State Patrol at 1000 Highway 10 West, Detroit Lakes, MN 56501-2205. (You can follow him on Twitter @MSPPIO_NW or reach him at, jesse.grabow@state.mn.us).

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