LOCATION:
A £2.7m contract to upgrade the A27 dual carriageway/A29 Fontwell Avenue four arm roundabout junction to facilitate a proposed residential development.
The A27 and A29 are major south coast traffic routes serving West Sussex. The A27 roundabout links surrounding villages and businesses and facilitates visitor traffic to the Fontwell Park racecourse.
- Site and vegetation clearance.
- Kerb and carriageway realignment.
- Carriageway resurfacing and widening.
- Public footpath upgrades.
- Drainage improvements.
- Standard lighting and telecommunications upgrades.
- Trees and landscaping.
- Environmental improvements.
- Traffic signals to the A27 arms.
- Utility diversions.
- Testing and inspections.
Challenges
The design to which we were working had been approved by National Highways three years prior to works starting. Since approval, the traffic signal design had fallen outside of updated design requirements.
The drainage design had been developed from incorrect information.
Solutions
Our site team and designers worked closely with National Highways to find a solution while avoiding a full redesign.
We were able to revise the incorrect drainage design into a working design, incorporating value engineering and removing a flow control system, having found an excessive measure for surface water.
Outcome
The works improved the safety and flow of traffic through the junction, reducing delays and improving journey times.
We worked closely with National Highways and West Sussex Council to develop traffic management plans and alterations that would improve safety, site access and overall output.
