Meanwhile, the only rail-based transportation system within Penang is the Penang Hill Railway, a funicular railway to the peak of Penang Hill. Opened in 1923, it is also the sole funicular railway system in Malaysia. The Penang state government has recently drawn up plans to bring in more rail-based transport systems throughout Penang, as part of the Penang Transport Master Plan. What are purposed are a Light Rail Transit line between George Town and Bayan Lepas, two monorail lines that connect George Town with Air Itam, Paya Terubong and Tanjung Tokong, a tram line limited to within George Town's UNESCO World Heritage Site and a cross-strait cable car line linking Komtar in George Town and Penang Sentral in Butterworth Currently, the Light Rapid Transit line between George Town and the Penang International Airport, also known as the Bayan Lepas LRT line, is being allocated the top priority by the Penang state government. On April 2019, the LRT project was received conditional approval from the federal government. Construction is expected to start in June 2020.