The Blackdown Hills are crossed by a network of minor roads. There are several major roads including the A30, A303 and A35. The M5 motorway is at the northwestern boundary of the AONB. The Bristol to Exeter line and the remains of the Grand Western Canal run, quite close in places, to the west of the M5 motorway but do not pass through the Blackdown Hills. The West of England Main Line passes through the southern part of the hills between Axminster and Honiton, including a tunnel section east of Honiton.