by RFP
I hardly ever post to avoid dumb questions but as I was reading about ordering red line cars et al today a dumb question surfaced. Why can't a universal train be ordered to run on the blue, orange and red lines? I know that red/blue/green/orange all have the same width track. Here goes..... If the track is not an issue I assume ?? that the other things to consider are tunnel clearances and power requirements. Surely, if tunnel clearance is an issue than the smallest universal car would be a fit for all. If power type of stuff is the sticking point can't the train have the ability to "shift" to the appropriate power requirement. It can't be this simple but if this kind of flexibility can be added the benefits are numerous and the maintenance / parts issues becomes much simpler and more economical.. Now, that I've been so simplistic, will someone pls set me straight? Thanks......