UT: UT 177/West Davis Corridor

[Markkos1992]

https://www.aaroads.com/forum/index.php?topic=27300.msg2604840#msg2604840

https://www.aaroads.com/forum/index.php?topic=27300.msg2881505#msg2881505  (Looks like it may open by the end of the year)

[Markkos1992]

Planned to be open on January 6, 2024.

https://www.aaroads.com/forum/index.php?topic=27300.msg2889749#msg2889749

[Duke87]

This is gonna be a doozy since before it can be added it will need to be determined what the signed exit numbers from I-15 and UT 67 are (probably 321 and 9, but need to confirm), as well as if the exits on UT 177 itself have signed numbers.

[US 89]

I will be in the Salt Lake area leading up to this. I probably won’t be able to actually drive it since I leave the day after it opens and probably will be doing other things, but presumably the signs on 15 and Legacy will be up before then.

Also, I give a 98% chance the exits on this thing are going to be numbered. Every other urban freeway in Utah does.

[US 89]

The long-awaited West Davis Highway opened today and I got a chance to drive it. Exit numbers on the new highway are:

1A - I-15 south
1B - SR 67/Legacy south
4 - 950 North, Farmington
7 - 200 North, Kaysville
9 - 2700 West, Layton
12 - 2000 West, Syracuse
13 - SR 127/Antelope Dr
15 - SR 193 (yes, there is no actual exit since the highway defaults into it, but it is fully signed as Exit 15. Similar to exit 24B northbound on Mountain View/SR 85 in Salt Lake City, which is a left turn across oncoming traffic.)

I-15: new exit 321.
SR 67: new exit 10.

SR 193 has also been extended west from its former endpoint at 3000 West, so that 193 and 177 currently end at the same place.

(EDIT: meant to post this in regular updates board. oh well)

[Duke87]

Woo thanks for the field check on the exit numbers!

https://github.com/TravelMapping/HighwayData/pull/7148