How do I get to the Nuka World transit?

I entered Nuka World last night. The Nuka-World Transit Center is way to the west edge of the map.

I fast traveled to the Lonely Chapel to its northeast, and just walked right up to it. There's a highway that leads into the main entrance.

I didn't want to enter the main entrance, since there were enemies there and I was using a stealth character, but I found a gap in the fence to the north of the main entrance.

Here's a video on YouTube of someone approaching the transit center from the Sunshine Tidings Co-Op. The transit center comes into view around 4:40.

I was having the same issue but I discovered if I deleted the regrowth overhaul mod I was able to walk right through