The flashing yellow lights were installed in the Duluth area some time ago and I do admit that I feel a bit funny "going on yellow".  The process has now expanded to the Cloquet area and has some of the residents confused.  The Cloquet Police department offers an explanation.

 

The flashing yellow light in question is at the new intersection on Highway 33 and Big Lake Road/Doddridge Avenue. Many people don't know what to do when they see the new, flashing, yellow arrow on the traffic signals.

Here's what the flashing yellow arrow traffic signals means.  You will see this feature in addition to the standard red, yellow and green arrows. When illuminated, the flashing yellow arrow allows waiting motorists to make that left-hand turn AFTER YIELDING TO ONCOMING TRAFFIC. Basically, if there is no on-coming traffic, you are free to execute your left-hand turn when you see the yellow light flashing.  Otherwise, the new traffic signals work the same as traditional signals.

This is a video that explains use of the yellow flashing light: