crtty wrote:First,how the electrify cost counted?
Ok, the cost of electric track is a bit buggy. The electrify-all option gives a small discount (I think I remember someone worked it out to around 15%). If you drag over the track with electric track laying turned on the quoted cost is for the track + the electric catenary. You only get charged for the electric catenary, the rest of the money stays in your account. It works, but it is confusing and you can't be quite sure of the exact cost on the fly.
I don't know what is happening with your train speeds. Obviously, they have enough sand, water and oil? What is their quoted speed in the game for the number of cars they are hauling? It could be the off chance that there is a hidden corner at a junction that somehow got made or exaggerated when you bought electric catenary. If there are no junctions on the line, this is virtually impossible. If there are, you could try bulldozing and re-laying those sections of line.
AT41B wrote:Is there a way to always cluster them to the Diner car?
Yes, use the custom consist switch near the top of the train consist page. Lots more is possible with custom consist, but all you need to do is use any freight for the first carriages on the train and any express on the last carriages (or if you want to get more complicated you could put mail as a specific cargo first and then passengers at the very end). Just recently, I was using mixes of haul any thing and haul express in Oilcan's Yellowstone map. I consider it to be a useful part of strategy there, as an alternative to running dedicated express trains.