The A129 is a main road in Essex

Essex

Essex is a ceremonial and non-metropolitan county in the East region of England, and one of the home counties. It is located to the northeast of Greater London. It borders with Cambridgeshire and Suffolk to the north, Hertfordshire to the west, Kent to the South and London to the south west...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

.

The road connects Shenfield in the west and Hadleigh

Hadleigh, Essex

Hadleigh is a town in southeast Essex, England, on the A13 between Benfleet and Leigh-on-Sea with a population of about 18,300.-History:Hadleigh is known for its castle, and the country park that surrounds it. The castle has been a romantic ruin for a few hundred years, but parts of two towers are...

 in the east, linking various commuter town

Commuter town

A commuter town is an urban community that is primarily residential, from which most of the workforce commutes out to earn their livelihood. Many commuter towns act as suburbs of a nearby metropolis that workers travel to daily, and many suburbs are commuter towns...

s in the county. It forms a road link between the railway stations of Shenfield

Shenfield railway station

Shenfield is a major station located in Shenfield in the borough of Brentwood in Essex, England. It lies on the Great Eastern Main Line and links Liverpool Street station in the City of London to places in the East of England. It was first opened by the Eastern Counties Railway on 29 March 1843 on...

 and Rayleigh

Rayleigh railway station

Rayleigh railway station serves the town of Rayleigh in Essex, England. The station, and all trains calling there, are operated by National Express East Anglia....

. More significantly, it serves commuters heading towards either London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 or Southend.

In the west, its route starts in the town of Shenfield at the junction of the A1023

A1023 road

The A1023 is an A-road in Essex, England.The road is approximately long and at its western end is an exit from the Brook Street Roundabout ....

  where it is called Hutton Road. From the town the road soon becomes Rayleigh Road and it runs through the adjacent village of Hutton

Hutton, Essex

Hutton is a former country village in south Essex. Today, it acts more as a commuter suburb of Brentwood. It has good links to Central London via Shenfield train station which is just from Hutton...

 and through a rural area until it enters the boundary of Billericay

Billericay

Billericay is a town and civil parish in the Basildon borough of Essex, England. It lies within the London Basin, has a population of 40,000, and constitutes a commuter town east of central London. The town has three secondary schools and a variety of open spaces...

 and becomes London Road. In the centre of Billericay the A129 is named Sun Street,at this point the road is one way and is only accessed from the Crays Hill direction. Drivers wishing to continue on this road have to turn right on the roundabout at Sun corner onto the B1007 Laindon Road, then turn left at the roundabout onto the A176 which rejoins the A129 which then becomes Southend Road. To the south of Billericay the road enters the village of Crays Hill

Crays Hill

Crays Hill is a village in the Basildon borough of Essex, England. The local school is Crays Hill Primary School. The River Crouch passes under Church Lane....

 and becomes Crays Hill. On exiting the village it is again London Road.
The road continues to Wickford and just before it is briefly interrupted by the A132

A132 road (England)

The A132 road is a road in England connecting Pitsea and South Woodham Ferrers....

  it is a dual carriageway

Dual carriageway

A dual carriageway is a class of highway with two carriageways for traffic travelling in opposite directions separated by a central reservation...

 for a short distance. When the road recommences off the A132 it is again called Southend Road. This passes through Shotgate. Just after it leaves Shotgate there is a Pegasus crossing

Pegasus crossing

A Pegasus crossing is a type of signalised pedestrian crossing with special consideration for horse riders. This type of crossing is nicknamed after the mythical winged horse, Pegasus...

. On approaching Rayleigh

Rayleigh, Essex

Rayleigh is a market town and civil parish in the District of Rochford in Essex, England, located between Chelmsford and Southend-on-Sea. It lies to the east of central London. It has a population of 30,196, having expanded rapidly in the 1960s.-Toponymy:...

 and passing under the A130

A130 road

The A130 is a major road in England linking Little Waltham, near Chelmsford, the county town of Essex, with Canvey Island in the south of that county. It is a primary route for most of its length, only losing that status south of the A13 junction at Sadlers Farm "magic" roundabout as it nears its...

 it again becomes London Road. In Rayleigh, it is first Station Road and then Crown Hill, both for short distances. It then runs North-South and becomes the High Street and High Road and intersects with the A127

A127 road

The A127, also known as the Southend Arterial Road, is one of the trunk roads in England linking London with Southend-on-Sea, the other being the A13. It is a dual carriageway for its entire length, rare on a trunk road since the only others are the A14 and the A282, and is known as the Southend...

 via a grade separated junction

Grade separation

Grade separation is the method of aligning a junction of two or more transport axes at different heights so that they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a...

. To the south of the A127 it is Rayleigh Road and runs through Thundersley

Thundersley

Thundersley is a district in the north west of the Castle Point Borough, in south east Essex, England, about 35 miles east of London.-Toponymy:...

 before terminating on the A13 Victoria House Roundabout in Hadleigh

Hadleigh, Essex

Hadleigh is a town in southeast Essex, England, on the A13 between Benfleet and Leigh-on-Sea with a population of about 18,300.-History:Hadleigh is known for its castle, and the country park that surrounds it. The castle has been a romantic ruin for a few hundred years, but parts of two towers are...