The A1309 is a short road (6.5 miles) which links the two ends of the A10 to north and south of Cambridge city centre in Cambridgeshire, England.

[citation needed] Its northern end is at the Milton Interchange with the A14 and A10.

From here, it passes the Cambridge Science Park, the Cambridge Business Park, and the Cowley Road Park & Ride site, as Milton Road on its way to the Mitchams Corner gyratory complex just to the north of the city centre.

It is unmarked through the city centre, but reappears to the south on the route of the A1134 ring road named Trumpington Road which then becomes Trumpington High Street.

In November 2022, work began to overhaul the Milton Road section of the route.