For TN 386: is there any TDOT documentation we're using to confirm that it begins/ends at the TN 109 interchange? I ask because signage is a flip-flop. SB 386 is signed from the TN 109 interchange and ramps, but NB 386 clearly as an END shield posted at its intersection with TN 174. TN 386 is also not shown along Long Hollow Pike (TN 174) on the TDOT Gallatin city map dated 2010.
For TN 174: the leg of TN 174 extending north from Gallatin to the Kentucky line is not in the highway browser. Was it just missed? It's doubly odd because where it crosses TN 52 has the proper point label on the TN 52 list. This leg begins on US 31E at Albert Gallatin Ave (northeast of TN 25), then turns north on Dobbins Pike and extends to the Kentucky border near US 231's border crossing.
