BOT - build, operate, transfer.
This is a model many countries' government use in building major
infrastructures. Private sector will chip in a lot in exchange for
exclusive rights to operate the facility (tunnel, train), for a
period of time (usually 30 years). When the period is up, the
government will reclaim the facility and run it itself.
I'm not sure what system Singapore's MRT is based on.
Privatised in the middle? And how did SBS Transit get rights to
operate NEL? Do we have a BOT scheme too?
Can a public transport buff answer these queries?
Not sure but the reason for SBST to get NEL / SKG / PGL lines is
to "foster competition" -- at least what LTA say so.