branches: one to On Ting Estate in the southeast, one to the Tuen Mun Ferry Pier in the southwest and another northern branch all the way into the town of Yuen Long along Castle Peak Road. It was then known as Light Rail Transit or LRT and is also called as the North-west Railway according to the Kowloon–Canton Railway Corporation Ordinance and Mass Transit Railway (North-west Railway) Bylaw. The transit system is the first and the only one in Hong Kong adopted zonal fare system. The feeder buses have fares independent of these zones, but provide discounts when passengers interchange between these buses and LRT. 70 single-deck LRVs were manufactured in Melbourne and Brisbane, Australia by Comeng, to be shipped to Hong Kong for the seven LRT routes in the system. Three of the routes were to Yuen Long and the others were confined to Tuen Mun. Extensions The system's first extension came for the southern and eastern parts of Tuen Mun. The eastern extension branches off the main line south of Siu Hong stop and crosses the river that runs through Tuen Mun immediately with a flyover. The line then runs along Castle Peak Road to a road north of the town centre, where it climbs to another flyover and rejoins the main route. The northern end of this extension is still the only non-triangular junction in the entire system. The southern extension mainly consists of a route linking On Ting and Ferry Pier, on the newly reclaimed land near the river mouth of Tuen Mun River, known as "Mouse Island" by locals. A short spur was also built from the extension to another terminus at Sam Shing Estate, located near Castle Peak Bay. Three LRT routes were diverted (route 505 was extended to Sam Shing) and one feeder bus route (route 559) discontinued as a result of these changes. Tin Shui Wai was originally an area with numerous fish ponds, but was developed as a residential new town in the early 1990s. With the increase of internal commuter traffic demand, an LRT spur was built north of Hung Shui Kiu stop that opened in 1993, with four stops serving the initial housing areas of the town. The area was further developed in the next few years and the line was extended by two stops: Chestwood and Tin Wing stop in 1995 (Tin Shui Wai Terminus was renamed Tin