that was my experience when I lived in Minneapolis. when there was zero traffic and in the summer, you could get from any place in town to any other place in between 15-20 minutes. snarled traffic was rare because there were so many additional terrestrial roads to take the burnt.

Contrast that with living in Philly, and we have a highway (676) that is so jammed all the time that the exits are measured on signage in fractions.