the imminent completion of the duplication of the Hume Highway with a community day at the Holbrook Bypass. Fixed speed camera locations In April 2007, 'point-to-point' fixed speed-camera sites were installed, in the median strip along the Craigieburn Bypass section and northward to Broadford, in Victoria, at roughly 15–20 km intervals. These measure both instantaneous (flash photography) speed and its speciality in the point-to-point versions (between two or more sites and then the average speed is measured to the fixed speed limit, comparing how long it takes a vehicle to reach one point from another). There are five sites, with two cameras (radar version) at each, totalling ten altogether. In Sydney: next to Ashfield Primary School, near Culdees Road Burwood, Willee St Enfield, Stacey St Bankstown, Brennan St Yagoona, and Knight St Lansvale. Exit numbering trial Between Prestons and Campbelltown, an exit numbering system was trialled from May 2016. Former route allocations Hume Highway has many former route allocations including former National Route 31. Where and when the former route numbers were implemented are stated below. Ashfield – Chullora: National Route 31 Metroad 5 State Route 31 A22 Chullora – Warwick Farm: National Route 31 State Route 31 A22 Warwick Farm – Casula: National Route 31 National Highway 31 Metroad 7 unallocated: A28 Casula – Prestons: National Route 31 National Highway 31 Metroad 5 Metroad 7 unallocated: A28 Prestons – Campbelltown: National Route 31 National Highway 31 Metroad 5 M31 Campbelltown – NSW/VIC border: National Route 31 National Highway 31 M31 NSW/VIC border – Campbellfield: National Route 31 National Highway 31 National Highway M31 M31 Exits and major interchanges Hume Highway exits and major intersections are spread across in the Australian states of New South Wales and Victoria. The highway's national route is divided into four sections comprising, from north to south, urban stretches of the highway in Sydney, a motorway from the outskirts of Sydney to the Southern Highlands, a grade-separated highway in regional New South Wales and across the state border, and a freeway throughout regional Victoria and into the outer suburbs of northern Melbourne. In Sydney, Hume Highway stretches southwest from in the inner west to via and . From Sydney's southwestern outskirts; Hume Motorway stretches south by southwest, from Prestons to outside bypassing and . From outside Berrima, Hume Highway stretches southwest by west, bypassing , , and before crossing the Murray River and entering Victoria.