I drove in NW Tennessee yesterday to get some counties and to look along US 51 at what it would take to upgrade to I-69. Some observations:
- I-155 currently ends at US 412 east in Dyersburg. However, the freeway continues along US 51 north through the remainder of Dyer County into Obion County, complete with a speed limit of 70. This makes me wonder if I-155 was indeed supposed to be part of something bigger, like a routing of I-24 which was discussed in
another thread.
- At Troy, TN, the freeway quickly ends and the speed limit drops accordingly as you transition onto a four-lane divided arterial.
- Between Troy, TN and Union City, TN US 51 remains a four-lane divided highway with at-grade intersections. A typical TN four-lane setup here.
- At Union City there is a bypass for US 51, but the bypass has a speed limit of 55 mph with at-grade intersections. I don't know where the construction for I-69 was in this area; I suspect it was a few miles to the north of the bypass from what I could tell. I didn't have time to investigate to see where the construction was.
- NE of Union City, US 51 resumes as a 70 mph freeway at it's interchange with TN 22 east. This setup ends just short of US 45E where what I suspect is Old US 51 (TN 214, Ken-Tenn Hwy) rejoins the alignment. It split off at Union City at the interchange with TN 22 east.
So between Dyersburg and Fulton, it doesn't seem like it would take much to upgrade to interstate standards. A bypass of Troy and Union City would all but do it. What I am curious about is how the TN section of I-69 will tie into the Purchase Pkwy with the complication of having the existing interchange with US 45E.