Iskandar Malaysia (IM) (Jawi: إسکندر مليسيا) formerly known as Iskandar Development Region (IDR) (Malay: Wilayah Pembangunan Iskandar; Jawi: ولايه ڤمباڠونن إسکندر) and South Johor Economic Region (SJER) is the main southern development corridor in Johor, Malaysia. The Iskandar Malaysia was established on 8 November 2006. The project is administered by Iskandar Regional Development Authority (IRDA) and was named after the 24th and fourth Sultan of Johor, Almarhum Sultan Iskandar ibni Almarhum Sultan Ismail.

The internal roads linking different parts of the city are mostly federal roads constructed and maintained by Malaysian Public Works Department. The five major highways linking the Johor Bahru Central Business District to outlying suburbs are Tebrau Highway and Johor Bahru Eastern Dispersal Link Expressway in the northeast, Skudai Highway in the northwest, Iskandar Coastal Highway in the west and Johor Bahru East Coast Highway in the east.Pasir Gudang Highway and the connecting Johor Bahru Parkway cross Tebrau Highway and Skudai Highway, which serve as the middle ring road of the metropolitan area. The Johor Bahru Inner Ring Road, which connects with the Sultan Iskandar customs complex, aids in controlling the traffic in and around the central business district. Access to the national expressway is provided through the North-South Expressway and Senai-Desaru Expressway. The Johor-Singapore Causeway links the city to Woodlands, Singapore with a six-lane road and a railway line terminating at the Southern Integrated Gateway. The Malaysia-Singapore Second Link, located west of the metropolitan area, was constructed in 1997 to alleviate congestion on the Causeway. It is linked directly to the Second Link Expressway, Johor Bahru Parkway, the railway station, and the North-South Expressway. Further expansion of other major highways in the city were currently in the process.

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