The Sentosa Gateway Tunnel will complement a package of road improvement measures that LTA announced in February 2008 to cater to the traffic volume increase in the Sentosa-HarbourFront area when Resorts World at Sentosa is completed.
With the completion of the Resorts World at Sentosa as well as other future residential and commercial developments in Sentosa Island, traffic volume plying the vicinity is expected to grow by some 20% between 2010 and 2015.
By 2015, the growth in traffic demand in the area would have almost utilised all available capacity for surface roads. Instead of widening the at-grade junctions further, LTA expects the completion of this road tunnel in 2015 to be a more efficient means to cater to the projected increase in traffic demand then. This will lead to a positive travel experience for all going to the Sentosa-HarbourFront area.
The road tunnel will connect outbound traffic from Sentosa Island directly to Kampong Bahru Road/Lower Delta Road and Keppel Road bypassing the busy traffic junctions of Sentosa Gateway and Telok Blangah Road, as well as Telok Blangah Road and Kampong Bahru Road.
Motorists traveling through these two junctions into Sentosa Island or to the other developments in the area can expect a smoother journey, while outbound traffic from Sentosa will have a direct connection towards the ECP via Keppel Road or the AYE via Lower Delta Road through this tunnel.
Concurrently with the tunnel construction, the LTA will be widening Lower Delta Road from two lanes to three lanes in both directions between Kampong Bahru Road and AYE. In addition, the LTA will upgrade the Lower Delta Flyover to allow motorists from Lower Delta Road (north bound) to connect directly to the AYE (city bound).