The A8 is one of Sydney, Australia's metropolitan arterial routes, formerly designated Metroad 10. The A8 route runs for 23 kilometres from North Sydney to Mona Vale. The route includes parts of several different roads. The A8 is the main transport link through the Northern Beaches district of Sydney. It forms one of only three road connections between the Northern Beaches area and the rest of Sydney (the others being the A3 and route A38 (Warringah Road)). The A8's crossing of Middle Harbour on the Spit Bridge has become infamous as one of the most congested road links in the city, made worse by the regular opening of the bridge to allow boats to pass by. The A8 will eventually connect with the M8 in the Inner West via the Western Harbour Tunnel & Beaches Link, M4–M5 Link, and Rozelle Interchange. Route The A8 starts at the Warringah Freeway (M1) at North Sydney. The A8 route ends at the intersection of Pittwater Road and with Mona Vale Road (A3), at Mona Vale. The A8 follows these roads from (North) to the (South): Pittwater Road Condamine Street Burnt Bridge Creek Deviation Manly Road Spit Road Military Road The majority of the A8 has three lanes in each direction. There are a few sections with only two lanes in each direction. None of the A8 route is a proper freeway, and it has intersections controlled by traffic lights every few blocks. History Most of the components of the A8 are old roads. The section of Military Road through Cremorne and Mosman was first built in the 1820s. The earliest bridge at The Spit, linking Mosman to Manly, opened in 1923, and was then rebuilt in the late 1950s with new, wider, approach roads on the southern (Spit Road) and northern sides (Manly Road) of the bridge. 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). Main Road No. 164 was declared along this road on 8 August 1928, from the intersection of Great Northern Highway (today Pacific Highway) and Mount Street in North Sydney, via Cremorne, Balgowah, Dee Why, Narrabeen and Mona Vale to Newport. The Burnt Bridge Creek Deviation opened in 1985 to bypass