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Motorway in Sydney, Australia

The Eastern Distributor is a and Sydney Airport. The Eastern Distributor separates Sydney's Eastern Suburbs from Sydney's Inner Southern Suburbs. The centre piece is a tunnel running from Woolloomooloo to Surry Hills. Built as a build own operate transfer project, it is 75.1% owned by Transurban. The motorway opened to traffic in December 1999, with the project fully completed in July 2000. It is only tolled in the northbound direction. Transurban considers the southern end of Cahill Expressway (including the Domain Tunnel) to be part of the Eastern Distributor, and denotes the latter to have a total length of The length of used in this article refers to the length of the motorway constructed in the 1990s between the southern end of Cahill Expressway (Cowper Wharf Road) and the northern end of Southern Cross Drive (Link Road).

The Eastern Distributor commences at the southern end of Cahill Expressway and the interchange with Cowper Wharf Road in Woolloomooloo and heads in a southerly direction as a dual carriageway six lane surface road, before entering piggyback tunnels shortly afterwards under the suburbs of Woolloomooloo and Darlinghurst, with a subterranean interchange with the Cross City Tunnel for direct connections to the Western Distributor. After returning to the surface in Moore Park, it continues south in a trench inside South Dowling Street, before ending at the interchange with Link Road and continuing south as Southern Cross Drive.

The project's centrepiece is the piggyback tunnel under one of Australia's most densely populated urban areas, necessitated due to the requirement of three lanes in each direction within the existing roadway corridor. The unique double deck, three lanes per direction design comprises a large, single tunnel excavation. At mid height through the excavation, a precast concrete ledge forms the base of the northbound tunnel, with the southbound tunnel slotting below. As a result, only one tunnel roof was created with the lower southbound carriageway built in a slot. According to the Australasian Tunnelling Society, no records are available of any piggyback tunnel (rail or road) where the upper carriageway has been carried on prestressed concrete planks resting on sidewall ledges. In the main tunnel there is a central length of where the span is typically greater than , and of note, there is no record of any road tunnel with spans greater than this where permanent roof support comprises rockbolts and shotcrete only and with vertical unsupported sidewalls of rock. Underpasses of the Eastern Distributor beneath William Street and Taylor Street were proposed to commence construction in 1974. The construction never eventuated.

The Eastern Distributor is owned and operated by Airport Motorway Limited (AML), which is 75.1% owned by Transurban. The remaining shareholders are Industry Funds Management (14.37%) and UniSuper (10.53%). When AML was incorporated, Leighton Group held 11% of AML, with Macquarie Infrastructure Group being the holder of the balance. Leighton sold its stake to Macquarie Infrastructure in 2000. By 2005, Macquarie Infrastructure Group held 71.35% of AML. Macquarie Infrastructure Group spun off Sydney Roads Group including its stake in AML in July 2006. Sydney Roads Group was sold to Transurban in April 2007. In September 2007, Transurban further acquired a 3.75% stake in AML, increasing its stake to 75.1% stake which it held to this day.

The Eastern Distributor is tolled in the northbound direction only for all traffic that use the main tunnel (Surry Hills/Moore Park to Woolloomooloo). There are two toll points on the Eastern Distributor: one at the northern end of the motorway and one at the William Street/Cross City Tunnel exit. Northbound vehicles along Eastern Distributor are charged the same toll price in either toll point. At the time of opening, the toll price for light vehicles (cars and motorcycles) was In April 2003, the toll price for heavy vehicles (trucks and buses) was .