That looks good and dense for a Montana map. I'd pay more than $11.99 for that. I'd easy be okay with $13.99 if we get that. For me, I look at it like this, what are the minimum amount of roads I'd make if I was a dev to save time but still offer options to the player by avoiding backtracking:
-Missoula to Great falls. No MT-200 and we have to go South/East on I-90 to I-15 North.
-Butte to Salmon. No MT-43 and its a pain route. Going thru Missoula or Idaho Falls makes no sense.
-Yellowstone to Bozeman. SCS teased US-89. That must come now. If there are things for US-287, unfortunately I'd cut US-191. One of the US roads that is almost complete. But Montana offers other options to make US-191 irrelevant.
-Lewiston to Billings, Great Falls or Bozeman. We get to any of these without US-12 and US-191. US-89 and US-87 achieve the same. Less mapping.
-US-89 is valid from YS to Great Falls with a straight shot. US-87 links Billings an Lewiston directly. Again, US-191 is expendable.
-US-191 is only valid from MT-200 to get to US-2.
-US-87 from Great Falls to Havre makes all of US-87 valid just alike all of US-89 is valid with Montana. US-12 and US-191 can get chopped up.
-MT-59 is obvious to continue from WY-59. Gillette to Miles City and further to Glasgow. So we need MT-24. Sidney is also confirmed so Sidney to Glasgow also needs
MT-24.
The only thing I think SCS should do is add Shelby as marked. Its the Cody of Montana. I don't think 15 marked cities for Montana is too bad. In the lower 48 states, Texas is the largest and it should have 25-35 cities California is the second largest and it has like 22...at least before the rebuild. Montana is the third largest. 15 really isn't far fetched in my honest opinion. Shelby is at I-15 and US-2 which is even more prime location than Cody is. Its a cross section that SCS can't miss no matter what with all of US-2 in, so might as well mark it. There should be zero space issues.
Shelby as marked, we don't need a huge city out of it either. The population is 3100 but that means nothing. What about the industry? There is a Pilot truck stop. Can't miss that so its gets in whether marked or not.
Ben Taylor off US-2 is part of the oil/gas. That is a good industry to add. Big Sky Seed right next to it is good. We don't have a seed facility but we have all this Agriculture going on in tge game and no seeds to deliver. The Fair Grounds. More livestock options here. Add that. There is Dirk's truck wash. One day, that too will get in as functional. That's a nice location for one. There is a feedlot that is also off US-2. That's part of live stock. Last is the Alberstons. We need a dedicated grocery story asap. Why we don't have several yet with Agricultural being a push, I don't know.