this rout runs from Chicago IL to Los angles CA. I think it it is a big route tsw needs the trains are P-42 double decker
This will NEVER happen. The route of the Southwest Chief is 2,265 miles long. There's no way any computer could handle that, I don't care how powerful it is. The storage size for this route would take up an entire hard drive and it would literally take 2 to 3 days to drive it from one end to the other. I mean yeah, it would be epic to do an entire Amtrak long distance journey from start to finish, but the technology isn't there yet and probably won't be there for years.
Well we already have 3 sections of it (LA-Fullerton, San Bernadino-Barstow, and Naperville-Chicago) with a 4th (Raton Pass) on the way. I'd love seeing some fast open running through states like Kansas and Missouri.
The only sections I can see getting in TSW are Chicago-Naperville and LA-Fullerton. Everything else would be too long for TSW's current standards.
First off, yikes, you really need to edit your post. Second of all, DTG would have to get licensing from mulitple railroads to do the whole route, and if they did do the whole route it would be uimaginably expensive. I would suggest a section such as Chicago to Kansas City or Kansas City to La Plata. The "double decker(s)" are called Superliner (I) (II) Cars, by the way.
DTG_Luke and several others have stated there is not a limitation in the UE engine for route length. What has been limiting is the project time line as they build up their library of assets. Now what would be limiting would be simmers that would be willing to sit for hours as you cross the plains of Kansas, or high plains of New Mexico and Arizona. I live in the southwest and even though I enjoy the scenery, it would be a bit taxing for me to sit through in a simulation .