Some important routes have been renamed as motorways, as published in the Government Gazette on 1 February 2013.
There are three routes in the Sydney region that have been renamed.
- The Sydney to Newcastle Freeway (commonly known as the 'F3') is now part of the M1 Pacific Motorway.
- The Hume Highway is now named the M31 Hume Motorway, from the M5 at Prestons to Berrima, after which it reverts to the Hume Highway. The route is alpha numeric route marked as M31.
- The M4 is the M4 Western Motorway between Lapstone and Concord.
There are eight routes with new route numbers in this region. For details please view or download the Sydney region factsheet (PDF, 1.3MB).