[kamaal]

>>Not sure where you got such wrong information by tunnel boring machines.

I'm not saying they don't use it. I'm saying they don't buy it. They lease it. Bangalore Metro's snail pace is largely due to inability to afford renting more TBM's.

TBM's are not cheap. Not for the budget projects like Bangalore(and other cities get) metro gets. Delhi and Mumbai are a different deal, as government spends money through a fire hose there. In fact South India pays most of the taxes and gets little in return, compared to North, which gets >1 rupee for every rupee it contributes to the exchequer.

South Indian cities are not that lucky.

One of the feedbacks that went into further phases for Bangalore Metro was to get more TBMs. They only used like 4 for the first phase, and even there one broke down and it took like months to get it fixed.