There are currently  of railways in Malaysia, of which  are double tracked and electrified. Rail transport in Malaysia comprises heavy rail (KTM), light rapid transit and monorail (Rapid Rail), and a funicular railway line (Penang Hill Railway). Heavy rail is mostly used for intercity passenger and freight transport as well as some urban public transport, while LRTs are used for intra-city urban public transport. There are two commuter rail services linking Kuala Lumpur with the Kuala Lumpur International Airport. The sole monorail line in the country is used for public transport in Kuala Lumpur, while the only funicular railway line is in Penang. A rapid transit project, the KVMRT, is currently under construction to improve Kuala Lumpur's public transport system. The railway network covers most of the 11 states in Peninsular Malaysia. In East Malaysia, only the state of Sabah has railways. The network is also connected to the Thai railway  network in the north. If the Burma Railway is rebuilt, services to Myanmar, India, and China could be initiated. Malaysia also operated the KTM ETS, (commercially known as "ETS", short for 'Electric Train Service') an inter-city rail passenger service operated by Keretapi Tanah Melayu Berhad using electric multiple-unit trains. The KTM ETS is the second electric train service to be operated by the Malaysian railway company, after the KTM Komuter service. The line length is 755 km (Padang Besar – Gemas) and additional 197 km from Gemas to Johor Bahru Sentral which is under construction.