The Knock-On Effect is a major road safety campaign and sponsorship initiative by Transport for NSW in partnership with the NSW Rugby League (NSWRL). It draws a powerful parallel between rugby—where a single dropped ball can lose the game—and driving, where one bad choice behind the wheel has tragic, far-reaching consequences.

The initiative specifically targets young men and country/regional drivers—groups historically over-represented in road trauma statistics—by leveraging the influence of respected rugby league stars.