Interstate 394 (I-394) is a small east–west auxiliary Interstate Highway in Hennepin County in the US state of Minnesota. It is also commonly referred to by its pre-1991 name, Wayzata Boulevard, and by its other designation, US Highway 12 (US 12). It runs for from downtown Minneapolis to I-494 in the Minneapolis suburb of Minnetonka. At its western terminus, the roadway loses its Interstate designation but continues as US 12. I-394 serves as the most direct link for commuters and other drivers who are traveling between downtown Minneapolis and parts of the western Minneapolis–Saint Paul metropolitan area. I-394 maintains at least three lanes in each direction except under the Minnesota State Highway 100 (MN 100) interchange and also between I-94/US 52 and its eastern terminus downtown. Route description I-394 begins on the western side of the Twin Cities in the suburb of Minnetonka, at its interchange with I-494 (exit 19). From there, I-394 takes a course toward downtown Minneapolis where the eastern terminus is at 4th Street North. Legally, the route of I-394 is defined as unmarked legislative routes 10 and 107 in Minnesota Statutes §§ 161.114(2) and 161.115(38). I-394 is not marked with these legislative numbers along the actual highway. E-ZPass Minnesota toll lanes There are two high-occupancy toll (HOT) express lanes at the center of the road. Prior to May 16, 2005, they had been traditional high-occupancy vehicle (HOV, or carpool) lanes, allowing busses, motorcycles, and vehicles with two or more occupants to use them during rush-hour periods, while single-occupancy vehicles were not permitted. Now, drivers riding alone can use the lanes at any time but must have an E-ZPass Minnesota electronic toll collection transponder in order to pay for using the express portions. From I-494 to MN 100, the lanes of I-394 are separated from traffic by double white lines. Between MN 100 and I-94/US 52 near downtown, the two lanes are combined into a reversible expressway in the median that is separated from the eastbound and westbound lanes by concrete barriers. This segment changes directions to accommodate the traffic flow at different times of day, so, in the morning, it is open to downtown-bound eastward flowing traffic, while it is open to westbound traffic in the evening. An E-ZPass Minnesota electronic transponder is required in order to pay tolls because there are no tollbooths on the roadway. The price varies depending on the time of day