Another issue was whether parts of the expressway near homes could be built as full tunnels, to ease traffic and noise disruption after the expressway is completed.
Transport Minister Raymond Lim replied that while the expressway was designed as a full tunnel in highly urbanised areas, this was not always possible because large plots of land about 15,000 square metres, or about two football fields, are needed for the required ventilation buildings.
"To place a ventilation building on any of these sites would put at risk the operations of a live MRT line, impede training for our national defence, or constrain our ability to have more homes in close proximity to the Yio Chu Kang MRT station."
He added that a ventilation building would have to be built in the vicinity of Bishan Park, which would adversely affect PUB's Active, Beautiful and Clean upgrading programme at the heavily used park.
ORIGINAL SOURCE
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