The Minnesota Department of Transportation is studying the use of high-occupancy-vehicle (HOV) lanes during highway construction on I-394. They set up a temporary HOV lane on US-12 to test how it affects traffic flow and commuter choices. The study looked at how the HOV lane design and operation, who uses it, and how construction impacts its use. They found that HOV lanes can help manage traffic during construction and encourage carpooling or bus use. The study identified circumstances where using HOV lanes during construction can be beneficial.