Minneapolis and St Paul are often rivals, but both have strong commitments to sustainable transportation.

Jarrett first worked in the Twin Cities in 2000, with Nelson\Nygaard, when he led the network redesign study that finally combined the historically separate Minneapolis and St. Paul networks into a single logical structure, eliminating transfers at the city limits. Later, he led the transit planning tasks for the ambitious Access Minneapolis project for the City of Minneapolis, with Nelson\Nygaard, Meyer Mohaddes, and SEH.