So i have come up the with the the 48 Mile sounder S Line from Seattle King Street Station to Lakewood Station via Tacoma Dome Station. There is a possibility for a huge amount of rolling stock and many passenger service. On a weekday during rush hour its incredibly busy and i think it would be cool to have this route. Amtrak, Sounder, and BNSF. The rolling stock used on this route is: EMD F59PHI EMD F40PH NPCU GE P42DC MPI MP40PH Siemens SC-44 Charger Talgo 8 Trainset Bombardier Bilevel VI, VII, IX BBL CEM Cabcar, Series VI, VII Cabcars Superliner II Sleeper (Both variants) Superliner II Dinner Superliner II Business Superliner II Lounge Superliner II Coach Viewliner II Baggage Horizon Cafe/Business Horizon Coach GE ES44AC GE ES44C4 EMD SD70ACe EMD SD40-2 Various Freight Stock So thats the rolling stock. If all of this gets included this would be a very busy route. Stations: King Street Tukwila Kent (Sounder Only) Auburn (Sounder Only) Sumner (Sounder Only) Puyallup (Sounder Only) Tacoma Dome South Tacoma (Sounder Only) Lakewood (Sounder Only) So after Tacoma dome Amtrak branches off and heads south via the Point Defiance Bypass. Sounder trains continue to Lakewood. Sounder Seattle-Lakewood Trains: 1501 1503 1505 1507 1509 1511 1513 1515 1517 1519 1521 1523 1525 Sounder Lakewood-Seattle Trains: 1500 1502 1504 1506 1508 1510 1512 1514 1516 1518 1520 1522 1524 Amtrak Trains both directions: 500 503 504 505 507 508 517 518 11 14 So yeah probably would be a nice route and it would be very busy and enjoyable.