There have been calls for Singapore to turn the current KTM railway into a kind of bikeway/nature corridor. Perhaps tellingly, buried in this New York Times article on NYC’s High Line is this:
Recently a team from Singapore (Is there really anything old and rusty in Singapore?) spent time on the landscaped walkways that stretch from Gansevoort Street to West 20th Street.
It just so happens that we do have something old and rusty that will not be used anymore in about a year’s time! It’s heartening that Singapore sent a team to NYC to study the high line — brings some hope that the nature corridor proposal might actually come through.
One Less Car 
This would be amazing. I really hope Singapore turns this into a pedestrian and cycling path…