It passes through Brockford Street (where it crosses the River Dove), Thwaite, Stoke Ash, Thornham Parva, Yaxley and Brome where it meets its junction with the B1077.

The road bypasses Scole and then Thelveton after which it meets a roundabout marking the end of the dual carriageway.

The road passes through mixed woodland close to the villages of Hainford, Stratton Strawless, Hevingham and Marsham.

From here it heads in a northerly direction close to the villages of Erpingham and Alby with Thwaite, passing through Roughton where it meets the B1436 and then merging with the A149 road.

[6] In 1986 the government's Roads for Prosperity White Paper proposed the dualling of the entire Suffolk stretch of the A140 from its junction with the A14 (then the A45) and Scole.

[9] In February 2016, Nicholas Churchill, a disgruntled middle aged construction worker stole his employer's mining truck and drove for about 50 km on this highway and other roads.

In 2002 Norfolk County Council held a public consultation which resulted in a preferred route being selected in 2003, which bypassed to the east of the village.