Keeping Jersey moving

Working with the Department for
Infrastructure, maintaining and improving
the highway network

Trinity To Gorey Section 1

The site is located between St. Martins School and Trinity Church along various roads extending approximately 2600m in length. The road is the primary route between Trinity and Gorey and comprises of a single carriageway separated into two lanes with two-way traffic. The road width varies from approximately 5.5m to 8m wide.

This part of the road network is one of the main roads in the north of the island and is a relatively heavily used road throughout the day especially by commercial and agricultural vehicles. To complete the works and maintain traffic flow the highway was closed completely with traffic diverted on agreed diversion routes as required. The road closures were between the hours of 9am to 6pm to try and minimise the disruption to traffic but maximise the working times on the road. The traffic management diversions had to be well maintained and managed throughout the works to ensure no commercial or agricultural vehicles were heading in opposite directions down narrow country lanes. Traffic modelling was used to ensure the traffic diversions were suitable and would work effectively.

The main works consisted of milling out 50mm thick of the existing road construction and replace it with 50mm thick 14mm Surface Course tarmac in accordance with the highways specification. Inspection covers were raised or lowered to suit the new road profile as and if required. Old inspection covers that were damaged or in a state of disrepair were identified and replaced. Where the road profile was realigned 50mm regulating tarmac was laid to new levels creating the new falls and prevent historic ponding of the highway.

New drainage gullies were introduced along with new kerbs to channel surface water to suitable collection points and then connect them to the existing surface water network.

Where the existing road was considered to be structurally unsound pavement strengthening was installed. This consisted of milling out 100mm deep of existing sub base and tarmac base course and laying 100mm thick of 20mm DBM binder course. Where necessary a further 150mm deep sub base was removed and 150mm thick MOT type 1 installed. Once the road was resurfaced the road markings were then painted on the road as per the drawings.

The job was programmed for 10 weeks and finished 1 week ahead of programme and within budget.