Expressways
The expressways of Singapore are special roads that allow motorists to travel quickly from one urban area to another. All of them are dual carriageways with grade-separated access. They usually have three to four lanes in each direction, although there are two-lane or five-lane carriageways in some places. There are nine expressways, including the new Kallang–Paya Lebar Expressway, which was completed in September 2008, and another one to start construction in 2008, the Marina Coastal Expressway. Studies about the feasibility of additional expressways are ongoing.
Construction on the first expressway, the Pan Island Expressway, started in 1966. The other expressways were completed in stages, with the Kallang–Paya Lebar Expressway being the most recently completed, in 2008. Today, there are 160 km of expressways in Singapore.
The Singaporean expressway networks are connected with Malaysian expressway networks via Ayer Rajah Expressway (connects with the Second Link Expressway in Malaysia) and Bukit Timah Expressway (connects with the Skudai Highway via Johor–Singapore Causeway).