One of my biggest gripes about Fargo is access to downtown and a smooth flowing east to west route through the cities.
As much as I would like to see a spur giving direct interstate access to downtown, the size and scope of such a project seems almost impossible. And anyone that has traveled into MN on Hgwy 10 from the Main Ave corridor in Fargo can tell you that the transition to/from hgwy 10 & Main at 8th street in Moorhead is a joke.
My solution? A 12th ave N / Demers Ave (GF) style viaduct between NP Ave @ University and Main Ave @ roughly 18-22nd street. (With NP being made 2 way with 5 lanes through downtown.) If you look at a map currently you will see that NP and Main between I29 and 25th St. run on the same line of longitude. Why not bridge the gap over the tracks and make traveling into FM from Highway 10 and out at I94 in West Fargo a smooth, straight line? The project would be less intrusive than an Interstate spur, as NP currently fades away behind warehouses at University, and only a few properties on the north side of Main would need to be raised. Not to mention the view coming into downtown from an elevated roadway over the BNSF line. :)