Why not use electrically powered light rail vehicles?
It would initially be most economical to use diesel power because of the high cost of constructing the overhead electrical wires. In addition, electrification could add substantially to the time required until service could be started. It would probably make more sense to begin service as quickly as possible and at the lowest practical cost, and then electrify the line at some future date as the traffic volume, train frequency and the number of stations increase. If DMUs were initially used, they could then be transferred to less heavily trafficked rail lines in the region.
