Diverging diamond interchange
A diverging diamond interchange (DDI), also called a double crossover diamond interchange (DCD)
The "Wikipedia, the free encyclopedia" URL listed, seems to have been updated for Minnesota in January of 2012.
This writer read a proclamation some place that seemed to say when you are on this type of interchange “You will not want to be behind a senior citizen driving the old Buick on this roadway for the first time.”