The A120 in Hertfordshire has had a bottleneck for many years through the village of Little Hadham, where the road narrows to alternate flows through the village, controlled by signals. The road and village was also susceptible to flooding during winter months, causing further disruption to traffic.
The current plan which received planning permission in January 2017 is to build a single carriageway bypass to the north, connecting with the existing A120 to the east and west of the hamlet. The plan involves crawler lanes up each side of the valley to the north of the village and also incorporates significant flood relief measures through the construction of two large embankments with culverts and spillways to hold back water from Little Hadham village. The scheme is therefore being promoted jointly between Hertfordshire County Council and the Environment Agency.
Work started in early 2019 with some land clearance, with roundabout construction starting in July 2019. A new overbridge was constructed for the C15 Albury Road, which opened in July 2020.