@Andrew Boyd
I Have been make some ideas for Southern Pacific and Pacific Electric in my Timeline, i will shared for you take some ideas, since i see your latest updates are from SP
During the New Deal program of President Roosevelt, many works occur along the US infrastructure systems. On railroads side, on West Coast, the Southern Pacific came if project of new mainline link L.A. to San Francisco and Sacramento, and extended the L.A. – San Diego Air Line. This route became the Ventura Corridor express mainline, use part of San Joaquin Valley Line and based on Boston & Western mainline Northeast Corridor on Eastern Megapolis.
egin the construction in 1933, the route are entire complete just before WW2 in 1939, and make one of great engineering projects at the time. On Bay Area, the new massive Bay Terminal Station based on Bauhaus style are built on South Park, on site of old Transbay Terminal from Key System and became the main station for Southern Pacific, Union Pacific, A.T.S.F. and for the Key System, together if a new link of Key over the recently-built Golden Gate bridge.
The Ventura Corridor are built in a very modern standart, as trains could run up to 180 kph by late 40s, have concrete ties, C.T.C. and electric sinalization. As way to compete if Union Pacific City of San Francisco and A.T.S.F. Streamliners, the Southern Pacific launch a new higher speed DMUs DSL-30 use on introduce California Vista link San Diego – L.A. and San Francisco, as together if existing Daylight that pass to use the corridor. The trainsets are built in cooperation if GE, Pullman and ALCO.
After WW2, the Southern Pacific pass to electrific the entire Coast Division and bought 40 units EP-300 from GE, later know as "Little Joes". 20 units receive the daylight scheme and the rest pass to use the Black Window scheme.
By 1954, Southern Pacific upgrade the routes L.A. - Phoenix - El Passo / Sacramento - Ogden / Sacramento - Portland and introduce they higher speed DMUs DXP trainsets on them. These lines are now entire duplicated, if bypass for freights and passenger and permit speeds of 200 kph, make intercity travel common.
- Another plans i have been thinking are
- ACL, Missouri Pacific and Seaboard introduce higher speed turbine trainsets by late 50s (OTL UAC Turbotrain from 70s, but if minor modifications);
- Union Pacific goes ahead if GTEL units until 70s and bought a new generation of GTEL-IV;
- City of NYC, P.R.R., New York Central begin the building of a new Hudson 4x tracks tunnel link direct over Pennsylvania Station and Grand Central and goes back to NEC. Building between 60s and 70s;
- Milwaukee Road introduce in 1964 a higher speed trainset on Hiawatha service between Chicago and Minneapolis, and use part of Lake Shore lines.
- By 50s and 60s, mostly of passenger traffic on american roads became by the streamliners or higher speed DMUs or EMUs between main cities.
And here´s a link from my fictional Boston & Western Timeline i have been make for sometime.
https://drive.google.com/file/d/1YmeCH5ZZilCNprT-dLzzMtKonDS3MuIS/view?usp=sharing
@Andrew Boyd, i have make some ACE Modern Steamers in some paint schemes. Did you have planning use them on your TL?