Subway System in the Kingdom of Bahrain

Having a subway or a train system in Bahrain, is a very good question to be brought up, due to the heavy traffic that is increasing year by year. But the answer to it is when, where and how, is it sufficient to built a subway system or train system. In my opinion a train system would cost less at the moment but depending on the gov't expenditure and how much they are willing to pay. But as you know these days everything seems in a way possible one way or the other.
Looking at a subway, which is a rapid transit either underground level or above ground level. In larger metropolitan area…