Richmond Road, Sydney

Richmond Road (and at its northwestern end as Blacktown Road) is a 23.5 km arterial road linking Richmond and Blacktown through the northwestern suburbs of Sydney, Australia.

Route
Blacktown Road commences at the intersection of Lennox and Bourke Streets in Richmond and heads in a southeasterly direction as a two-lane, single carriageway road, meeting George Street at Londonderry, where it changes name to Richmond Road and continues to meet The Northern Road a short distance later, then continuing southeast before widening to a four-lane, dual-carriageway road through Marsden Park until it reaches the interchange with Westlink M7 at Dean Park. It continues southeasterly through Woodcroft until it reaches the outskirts of Blacktown, crossing the Main Western railway line as a bus-only road, before terminating at the intersection with Kildare Road and Patrick and Main Streets in Blacktown.

History
The passing of the Main Roads Act of 1924 through the Parliament of New South Wales provided for the declaration of Main Roads, roads partially funded by the State government through the Main Roads Board (later the Department of Main Roads, and eventually Transport for NSW). With the subsequent passing of the Main Roads (Amendment) Act of 1929 to provide for additional declarations of State Highways and Trunk Roads, the Department of Main Roads (having succeeded the MRB in 1932) declared Main Road 537 along Richmond Road, from the intersection with Garfield Road in Marsden Park to the intersection with Rooty Hill Road (and continuing north along Garfield Road to the intersection with Windsor Road in Box Hill, and continuing south along Rooty Hill Road to the intersection with Great Western Highway in Wallgrove), on 19 May 1948; its northwestern end was re-aligned to run all the way along Richmond and Blacktown Roads to Richmond (with the former alignment along Garfield Road replaced by Main Road 546) on 15 February 1950.

The passing of the Roads Act of 1993 updated road classifications and the way they could be declared within New South Wales. Under this act, Richmond and Blacktown Roads retain their declaration as part of Main Road 537.

The route was allocated part of State Route 61 in 1974. When Westlink M7 opened in 2005 (subsuming Philip Parkway, part of State Route 61), the allocation was removed in its entirety.