Klang Valley (; ; ) is an urban conglomeration in Malaysia that is centered in the federal territories of Kuala Lumpur and Putrajaya, and includes its adjoining cities and towns in the state of Selangor. It is conterminous with Greater Kuala Lumpur, although there are variations between the two. The Klang Valley is geographically delineated by the Titiwangsa Mountains to the north and east and the Strait of Malacca to the west. It extends to Rawang in the northwest, Semenyih in the southeast, and Klang and Port Klang in the southwest. The conurbation is the heartland of Malaysia's industry and commerce. As of 2022, the Klang Valley is home to roughly 9 million people. Origin The valley is named after the Klang River, the principal river that flows through it that starts at Klang Gates Quartz Ridge in Gombak and flows into the Straits of Malacca in Port Klang, The river is closely linked to the early development of the area as a cluster of tin mining towns in the late 19th century. Development of the region took place largely in the East-West direction (between Gombak and Port Klang) but the urban areas surrounding Kuala Lumpur have since grown north and south towards the border with Perak and Negeri Sembilan respectively. Regions There is no official designation of the boundaries that make up the Klang Valley but it is often assumed to comprise the following areas and their corresponding local authorities: Federal Territory of Putrajaya Putrajaya Corporation Federal Territory of Kuala Lumpur Kuala Lumpur City Hall Selangor district of Petaling Shah Alam City Council Petaling Jaya City Council Subang Jaya City Council Selangor district of Klang Klang Municipal Council Selangor district of Gombak Selayang Municipal Council Selangor district of Hulu Langat Ampang Jaya Municipal Council Kajang Municipal Council Selangor district of Sepang Sepang Municipal Council Selangor district of Kuala Langat Kuala Langat Municipal Council Transport Even though the Klang Valley officially consists of separate cities and suburbs, integration between these cities is very high, with a highly developed road network and an expanding integrated rail transit system. Many expressways criss-cross the metropolis making cars the most convenient way to get around. However, this has led to the Klang Valley's notorious traffic jams which span whole kilometres of expressways and make driving during peak hours exhausting. Since the 1990s, new rail systems, such as Rapid KL's light rapid transit (LRT), mass