The A5120 is an A-class road in Bedfordshire, linking the conjoined towns of Ampthill and Flitwick to Dunstable and, via the M1 motorway, Luton and London. It connects with the M1 at junction 12, being the sole road at this junction, in close proximity to the Toddington services. On its route from Ampthill to Dunstable, the A5120 serves Westoning, Harlington, Toddington and Tebworth.