allowed. List of Expressways Semi-expressways Singapore also has five semi-expressways: Bukit Timah Road, Jurong Island Highway, Nicoll Highway, the Outer Ring Road System (ORRS) and West Coast Highway. These semi-expressways are scaled down versions of expressways, without a uniform speed limit. Some sections still feature traffic light controlled junctions, such as the eastern section of the ORRS, some of Bukit Timah Road, the southern section of the Jurong Island Highway and the western sections of Nicoll Highway and West Coast Highway. However, much like with the expressways, semi-expressways allow motorists to travel quickly from one urban area to another with the use of viaducts, overpasses and tunnels. See also Land Transport Authority Ministry of Transport (Singapore) References http://www.lta.gov.sg https://web.archive.org/web/20081106151957/http://www.kpeunderground.sg/ Expressways