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| A120 (England) | |
|---|---|
| Country | ENG |
| Route | 120 |
| Length mi | 34 |
| Direction a | West |
| Terminus a | Puckeridge |
| Direction b | East |
| Terminus b | Harwich |
| Counties | Hertfordshire, Essex |
| Destinations | Bishop's Stortford, Great Dunmow, Braintree, Colchester, Clacton-on-Sea, Harwich International Port |
A120 (England) is a primary road in England linking the M11 motorway and A10 road near Puckeridge and Bishop's Stortford with the Port of Harwich via Great Dunmow, Braintree and Colchester. The route serves strategic freight access to North Sea ferry services and Containerisation logistics, and forms part of regional connectivity between London, East Anglia, and Felixstowe corridor traffic. It traverses historic market towns and crosses routes such as the A12 road, A131 road and A133 road.
The road begins near Puckeridge at a junction with the A10 road close to Ware and skirts Bishop's Stortford before following an eastward alignment past Takeley and the Stansted Airport environs, intersecting the M11 motorway and providing linkages to London Stansted Airport. Continuing through rural Hertfordshire into Essex, the A120 bypasses Great Dunmow and proceeds toward Braintree, where it meets the A131 road and connects with local routes to Saffron Walden and Haverhill. East of Braintree the road crosses the River Colne and approaches Colchester, joining arterial links toward Ipswich and Chelmsford. Beyond Colchester it continues northeast toward Clacton-on-Sea and concludes at the ferry and freight terminals serving Harwich International Port and Parkeston Quay, interfacing with shipping lines to Hook of Holland and the North Sea Channel.
The corridor follows historic coaching and postal routes that connected London with eastern ports such as Harwich and Ipswich since the Georgian era. Parts of the modern alignment trace older turnpike trusts established in the 18th and 19th centuries that linked market towns including Braintree and Great Dunmow to the City of London. Throughout the 20th century the route was progressively upgraded from rural single carriageway roads used by Royal Mail coaches and early motor traffic to modern primary route status as freight traffic to continental ferry services expanded after World War II and during the growth of Roll-on/roll-off shipping in the 1960s and 1970s. The arrival of Stansted Airport and the development of the Container Shipping industry prompted further reclassification and bypass construction in the late 20th century.
Major schemes have included dualling and bypass projects driven by bodies such as Highways England and local county councils. The Great Dunmow bypass and the Braintree bypass were delivered to relieve town centre congestion and to improve access to the M11 and A12. Junction improvements at Takeley and the A131 interchange incorporated designs informed by standards from Department for Transport guidance. Recent proposals have considered further dualling between Braintree and Boreham near Chelmsford and enhancements to freight access to Harwich International Port supported by strategic plans from the National Infrastructure Commission and regional development agencies such as the East of England Local Enterprise Partnership.
Traffic monitoring by agencies including Essex County Council and Hertfordshire County Council records variable flows with peak freight and commuter congestion associated with Stansted Airport and seasonal holiday movements to Clacton-on-Sea. Collision data compiled under national reporting frameworks show higher incident rates historically at older at-grade junctions and single carriageway sections; targeted measures such as roundabouts, signalised junctions and average speed enforcement have been implemented. Freight tonnage statistics link movements on the route to volumes at Harwich International Port and cross-Channel freight trends, with periodic surveys demonstrating heavy goods vehicle concentrations during autumn and spring shipping peaks.
The corridor is a linchpin for links between London, East Anglia and continental Europe, serving distribution centres, manufacturing sites and agricultural markets in Essex and Hertfordshire. It supports access to Stansted Airport and to maritime freight at Harwich International Port, facilitating connections for carriers and logistics operators including container lines serving the North Sea network. Towns along the route—Bishop's Stortford, Great Dunmow, Braintree and Colchester—benefit from commuter inflows and business investment tied to improved journey times and intermodal freight capacity, influencing planning decisions by bodies like the South East Local Enterprise Partnership and attracting warehousing and distribution operators.
Upgrades have required environmental assessments under legislation such as planning regimes administered by Natural England and local planning authorities, addressing impacts on River Colne habitats, Stour Valley landscapes and protected species. Archaeological surveys have identified features from Roman and medieval periods in the Colchester hinterland, necessitating mitigation measures coordinated with organisations including Historic England and local museums. Road schemes incorporate noise mitigation, drainage design to manage floodplain interactions with the North Sea catchment and landscape planting to reduce visual intrusion near conservation areas and listed sites within the jurisdictions of Braintree District Council and Colchester Borough Council.