The M1 has now re-opened after 750 kilograms of scrap metal was strewn across the motorway, damaging hundreds of cars and sparking traffic up to 40km long.

The mother of murdered domestic violence victim Mackenzie Anderson says she is disgusted by the sentence handed down to killer Tyrone Thompson.

Both Anthony Albanese and Peter Dutton have spent the day crossing the country in a last ditch effort to pick up votes.