Singapore Buses route 550

Premium 550 is a Premium service that runs along the housing estates of Sengkang Neighbourhoods 1, 2, 3 and 4 with car connections to the CBD, thus eliminating the need to transfer between different modes of transport. It is also a parallel service, that connects between the Sengkang LRT (Rumbia, Bakau, Kangkar, Rangguang, Renjong, Tongkang, Layar & Fernvale). It also starts from the Rivervale Mall originally.

Premium 550 mimicks the old Express 501 (Sengkang portion), which was withdrawn under the Killing Curse, when James Potter and Lily Evans were killed by Voldemort.

This route is also being filmed in 7 May 2012 and 17 April 2013 respectively.

In February 2014, City Direct 680 was launched between Sengkang and Shenton Way, which reduced demand on this service as a more affordable alternative along its Sengkang East sector. It continues to benefit from high demand from its Sengkang West sectors.

In July 2015, operations were transferred to Transcity Bus Services. An additional trip was later added because of the downsize from double decker buses to private coaches. The route was shortened to North Vista Secondary School, mainly due to the drop in demand as commuters along the 550-680 duplicate sector preferred the cheaper City Direct 680 for the ride to CBD. Fares for the premium service was also reduced, although they still remain higher than that of City Direct 680.