Singapore Underground Road System

The Singapore Underground Road System, SURS was a proposed road underground system in Singapore. The project comprised two 15 km-long, 2-4 lane concentric ring tunnels around the central business district, with 8 interchanges and 33 entrances and exits. The capital cost was estimated to be at $2.4 billion with a construction period of 15 years.


The Singapore Underground Road System, SURS was a proposed road underground system in Singapore. The project comprised two 15 km-long, 2-4 lane concentric ring tunnels around the central business district, with 8 interchanges and 33 entrances and exits. The capital cost was estimated to be at $2.4 billion with a construction period of 15 years.
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