In 2015, Sentosa opened an intra-island Cable Car to facilitate travelling within the island. Dubbed the sky network, the Cable Car has 3 stations, in Siloso, Imbiah and near the now-closed Merlion, and is not linked to the original Cable Car. Public bus services are available to connect Sentosa Island to the mainland. Tong Tar Transport service RWS8 operates between VivoCity/ HarbourFront station to Resorts World Sentosa. SMRT Express Bus Services 188R and 963R operates between Choa Chu Kang and Woodlands respectively Resorts World Sentosa on weekends and public holidays. On 30 June 2017, SBS Transit Bus Service 123 was extended to enhance connectivity to Resorts World Sentosa, Merlion Tower (now closed) and Beach Station Bus Terminal. The island is also accessible by the Sentosa Express monorail, which replaced the old Sentosa Monorail that operated from 1982 to 2005. The Sentosa Express has three stations on Sentosa and one on mainland Singapore. The northern terminus of the line, which opened on 15 January 2007, is located at the VivoCity shopping mall on the mainland and the southernmost terminus, Beach Station, is located on Sentosa Island. In Vivocity, the mainland MRT is in turn served by the HarbourFront of the North East Line and the Circle Line. Within Sentosa there are three bus services, identified as Bus A, Bus B and Bus C. Bus C duplicates Bus A's service entirely but both are operating. Since 1998, passenger cars have been allowed to enter the island. Visitors can also access the island via the Sentosa Boardwalk which is parallel to the causeway (which opened on 29 January 2011). The first two days of its opening were marked with free entry into Sentosa for visitors who walk, and subsequently a SGD 1 admission fee into Sentosa is charged. From 7 June 2014 to 4 January 2015, walk-in entry into Sentosa via the Sentosa Boardwalk is free on weekends and public holidays. Walk-in has been free of charge since the end of SG50 celebrations. The Sentosa Boardwalk hosts frequent bazaars on weekends. Sentosa Beach Tram is a tram which serves Palawan Beach, Siloso Beach and Tanjong Beach, using four vehicles including 2 Volvo B12BLEAs, in which second carriage is an open top and another one with green and blue liveries. The Volvo B12BLEAs were manufactured by ComfortDelGro Engineering bodywork.