A898 Erskine Bridge Vehicle Barrier Replacement

Project Summary: 
Replacement of the existing vehicle barriers along the central reserve and nearside lane
Location: 
West
Type: 
Bridge-Road
Other Details: 
The Erskine Bridge

Why is it needed?
The existing vehicle barrier arrangement does not provide the level of protection required to the bridge towers and cable anchorages against heavy goods vehicle (HGV) impact hence the need to replace the barriers.

The existing nearside barriers are non-standard with an unknown level of containment consisting of tubular post and double rail.
 
Replacement barriers are required to reduce the risk of structural damage to the bridge towers, cable anchorages and nearside deck cantilever sections.

What is involved?
Contractors will:

  • Remove the existing vehicle barriers on the central reserve and the nearside lane
  • Install new H4a High containment vehicle barriers
  • Undertake carriageway surfacing repairs

How much will it cost?
The cost of the works is approximately £6 million.

Map of the Erskine site

What stage is it currently at?

The northbound carriageway of the Erskine Bridge will fully reopen to traffic by Monday 17th March 2014, or earlier if weather conditions permit, ahead of schedule.

The contractor has completed the replacement of both the northbound near and offside vehicle safety barriers.

The Contractor, Highway Barrier Solutions (HBS) installed this major phase of vehicle safety barrier replacement work ahead of schedule, meaning that:
•traffic will return to two northbound running lanes,
•the A726/A898 northbound on-slip will be reopened
•and the northbound diversion routes will cease.

Meanwhile works will continue on the southbound carriageway where the replacement of the offside vehicle barrier is complete and work has recently commenced on the final nearside barrier replacement phase.

A single southbound lane will continue to operate for this phase for which continuous traffic management is necessary.

How will it affect me?

The northbound carriageway of the Erskine Bridge will fully reopen to traffic by Monday 17 March 2014, or earlier if weather conditions permit.

Works will continue on the southbound carriageway where a single southbound lane will continue to operate for this phase for which continuous traffic management is necessary. We would advise motorists that southbound delays from Dumbarton and Clydebank of up to 30 minutes are still to be expected at peak times.

The temporary 40mph speed limit signage will remain in place in both directions until the southbound nearside barrier replacement work is complete, the relining of both carriageways has been finished and new 50mph speed limit signs have been installed.

Completion of all works is planned for end of May 2014.

View the public information leaflet (PDF, 318KB)

A898 Erskine Bridge FAQs (PDF, 149 KB)

A898 Erskine Bridge – Vehicle Barrier Replacement works

Construction Phase:

The following report describes the processes to remove the original barrier and install the new high containment barrier at one post location on the northbound nearside barrier. Each of these processes needs to take place approximately 320 times on this side. Similar steps will be taken in the southbound nearside barrier and the two central reserve barriers. Throughout the project over 1200 new posts will be replaced and over 15600m of rails installed.

Construction process report (pdf, 13MB)

Vehicle Barrier Replacement – Barrier Costing and Options Report (Flint & Neill) (pdf, 2.4MB)

Bluetooth Delay Monitoring

Bluetooth technology is currently being used to monitor delays on all approaches to the A898 Erskine Bridge to provide up to date, reliable, real journey time information to Traffic Scotland and keep the travelling public informed of the most up to date travel times

Bluetooth detectors are located on each approach to the bridge and identify any passing Bluetooth device (car on-board computer system or mobile phone) at different locations on the network. This data is then processed and reliable live and historical journey time information displayed on our monitoring website.

As can be seen in the delay graphs (PDF, 168KB), delays are typically confined to the morning and evening peak period each day with less  disruption being experienced  at other times.

We fully appreciate that road users are  being inconvenienced while these improvements are being put in place.  We are doing everything we can to minimise this.  These works are essential and are required to bring the Erskine Bridge up to current standards and ensure the long term safe operation of the bridge.

Please be patient, plan your journey in advance using the Traffic Scotland website and allow for extra journey time when travelling during peak periods. Please also consider using alternative modes of transport where possible and listen for travel updates on the radio.

What is being done to reduce the environmental impact?

The environmental impact of the works will be minimal as the works are replacing an existing vehicle barrier on the bridge deck. Control measures will still be put in place to protect the local environment.

The works include a number of noise generating activities, which can only be undertaken during the day due to the proximity of residential properties. In general, noisy operations are only permitted day-time Monday to Saturday.

Night-time working would breach local authority noise requirements which also include Sundays (the contractor has however been working all but one Saturday since the commencement of the works in an effort to expedite the works).

For further details please see the report titled: Vehicle Barrier Replacement Works – Environmental Noise Review

Are there any other online legal documents / public notices relating to this project?
No.

Contact
For more information please contact:

Trunk Roads & Bus Operations (TRBO)
Transport Scotland
Buchanan House
58 Port Dundas Road
Glasgow
G4 0HF

Telephone: 0141 272 7100
Email: info@transportscotland.gsi.gov.uk