Singapore's North-South Expressway not exactly the green choice

Today Online 27 Jan 11;

I am sure the planned North-South Expressway (NSE) will ease traffic congestion on the Central Expressway come 2020. However, will the NSE adversely affect the natural eco-system/greenery in the Mandai area? Will the vehicular quota be raised after the NSE is built and how will this negatively impact the environment?

Shouldn't the natural first choice - before deciding to build a new expressway - have been to set up more MRT stations as trains move more people faster with given energy resources?

I hope the Land Transport Authority's masterplan will not impede Singapore's aspiration to be viewed as a green country and an attractive home for environmentally-conscious foreign talent. Letter from Colin Ong Tau Shien