I gotta say, I love the FrontRunner in Salt Lake. It's only 88 miles long (for now) but probably 75% of Utah's entire population is within a few minutes walk/drive of rail transit because of it. I think it partially works so well because of geography: the urban area is strongly oriented along a north-south axis, so a train that runs along that spine connects a lot of customers. The
Republican-led legislature also gave UTA $200 million for FrontRunner double-tracking this year.
The downside of SLC's system right now is its pitiful
central station. It's not much more than a platform and it's pretty far from the CBD. That is hopefully
going to change soon though!