The Heritage Roads scheme was implemented in 2001 by the Singapore government to identify and protect roads whereby there are lush road-side trees, often so dense that they create "green walls" and even "green tunnels".
[1] Concerns that rapid urban development will result in the removal of these trees especially due to the widening or realignment of these roads, the authorities identified 5 roads from a list of 55 suggested by the National Parks Board.
[2][3] The remaining roads were placed on a watchlist to be closely monitored, and may be added to the scheme later.
[citation needed] As part of Tengah Air Base's expansion, portions of Lim Chu Kang Road, a heritage road, will be closed off.
[4]