The main modes of public transportation in Kuala Lumpur are the LRT (light rail transit), MRT (mass rapid transit), bus, ERL (express rail link), and KTM Komuter (commuter train). The LRT and MRT are the most efficient ways to get around the city, as they have dedicated tracks and operate on a regular schedule. The bus system is also extensive, but it can be slower due to the road traffic and sometimes more crowded than the LRT or MRT. The ERL is very useful for traveling to and from Kuala Lumpur International Airport (KLIA), while the KTM Komuter is for commuting to the suburbs.