Penang Island is connected to the mainland by the 13.5-kilometre, three-lane, dual carriageway Penang Bridge (completed in 1985), one of the longest bridges in Asia. On 31 March 2006, the Malaysian government announced a second bridge project, tentatively named the Penang Second Bridge. The bridge is currently under construction and is expected to be completed by the end of 2013.
Penang on the side of Province Wellesley is connected to the North-South Expressway (Lebuhraya Utara-Selatan), the 966-km long expressway which traverses the western part of Peninsular Malaysia linking major cities and towns. The expressway also comprises the Penang Bridge.
The proposed Penang Outer Ring Road (PORR) was mooted to cut travelling time on the eastern part of the island but was subsequently shelved. Concerned citizens voiced protests over the designated route which will cut across quiet residential areas and may also adversely affect the environments.
The Tun Dr Lim Chong Eu Expressway formerly known as the Jelutong Expressway, a coastal highway on the eastern part of the island, links the Penang Bridge to George Town. The Butterworth Outer Ring Road (BORR) is a 14-km tolled expressway that serves primarily Butterworth and Bukit Mertajam to ameliorate the upsurge in vehicular traffic due to intense urban and industrial development.