Firstly, I do want to say that I have hundreds of hours of fun with TS, but I have also spent hundreds of pounds on officially promoted additions. I just do not understand what the target system is when going through Watford on the WCML add-on, where the game is installed to the M.2, on a Ryzen 5900x, with a RTX 3080, and 32GB of 3200 of RAM with a sub-16 CAS and the frames still drop to below 18fps. At this current moment, no game should drop that low on those specs. It's been a frustrating night when before that I couldn't complete a south wales task because the shunt signal wouldn't clear to reverse back into the sidings, but at least that would render at 130FPS.
If you read in the General Discussion forums the route has been plagued with low FPS since its introduction DTG did some upgrades to improve it but not totally If you are going faster than 75mph ish past Wembley the gantries and wires don't have time to render