M90 Forth Road Bridge Replacement

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Scheme Outline

Scheme details

Under construction
New road with some parts under motorway restrictions
£ 2bn
Transport Scotland
Region: Scotland
Scottish Executive
8 km
5 miles

Construction of a new cable-stayed bridge across the Forth Estuary to carry a dual two-lane road with hard shoulders. The bridge will be sited to the west of the existing Forth Road Bridge, which is suffering serious structural faults. The new bridge was rushed through the planning process and fast-tracked to construction, because when the scheme was first proposed it was feared that the existing Forth Road Bridge may have been too weak to carry heavy goods vehicles even before the new bridge could be brought into service.

The proposed new cable-stayed bridge will have three slender single column towers and will be 2.7km long, including approach viaducts. The road carried by the bridge will be designated as a southward extension of the M90.

To the south of the bridge, a new motorway standard road will link the crossing to the A90 and M9, making use of the M9 Spur. The spur has been reclassified M90, but will be separated from the new bridge by a short section of all-purpose road, so the M90 will be in two parts. To the north, the bridge will flow directly into the M90, incorporating junction enhancements at Admiralty and Ferrytoll, and road widening between those junctions.

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14 May 2008
23 January 2009 Public exhibitions are being held at the moment. The new road will not now terminate on the M9 but will tie in with the existing A90 on the south shore at the newly created Scotstoun Interchange which was created when the M9 spur was extended.
16 July 2009 Transport Scotland have announced that the Forth Replacement Crossing tender process has commenced.
17 November 2009 Legislation is now being presented to the Scottish Parliament. There is a big question mark over funding that is still outstanding.
26 May 2010 MSPs voted in favour of the new Forth crossing, allowing the project to proceed to the next parliamentary stage. Provided there are no major problems, work is expected to begin in 2011 and be completed by 2016.
25 December 2010 Final approval for the replacement bridge was given by the Scottish Parliament on 15 December 2010.
25 January 2011 The bridge has now received royal assent in Parliament and construction will begin later this year.
22 March 2011 The Scottish government has announced the preferred bidder for the Forth Replacement Crossing.
17 July 2011 The Principal Contract for the design, construction and completion of the Forth Replacement Crossing (FRC) has now been formally awarded to Forth Crossing Bridge Constructors (FCBC) consortium. Construction on the FRC is expected to begin during the summer of 2011. Contracts for the Intelligent Transport System (ITS) and the upgrade of the M9 at Junction 1a near Kirkliston have also been awarded.
23 September 2011 A mandatory 40mph speed limit came into force today in order to allow traffic management systems to be put in place on the M90 and A823(M), as part of the wider Forth Replacement Crossing scheme.
16 February 2012 Work has started at the M9 spur and there are now average speed camaras there.
11 October 2014
16 December 2014 All three towers are well above deck level with the first deck sections under construction on temporary formwork. North and south approach viaducts are progressing.
17 March 2015 Speed restrictions are about to begin on the Forth Road Bridge - as the increasingly high towers of the new bridge are a distraction!
3 August 2015 The first cables have appeared, on the north side of the north tower.
21 October 2015 The old B800 overbridge at Scotstoun is to be demolished over the weekends of 24/25 October and 31 October/1 November. On the Fife side, the new northbound carriageway over Ferrytoll Junction is surfaced and painted ready for the next phase of traffic management (from Friday 23 October).
18 February 2016 The launching out of the north approach viaduct has begun, from the onshore construction site onto its two piers.
9 March 2016 North Approach Viaduct is now on top of both the N1 and N2 piers.
25 April 2016 Raising of the deck sections has now passed the halfway point - the 55th out of 110 sections was installed in March.
9 June 2016 Poor weather in April and May have pushed the completion date to March 2017.
12 August 2016 The northern deck section is now fully connected to its approach viaduct. This is the first of the four connections to be completed.
3 November 2016 The central tower's deck section has met that of the south tower, and they are being connected. The gap to the north tower deck is awaiting its final (shorter) section, and will be connected soon. Further north, the Ferrytoll roundabout is now circulating on the final alignment, albeit coned down to one lane only.
18 February 2017 On 3rd February, the last section of crossing was lifted into place, meaning the 1.7 mile bridge is now complete end-to-end.
17 March 2017 The new northbound on-slip at Ferrytoll is now fully open (direct from the roundabout). Work has begun at the northern end of the bridge to install the wind deflection fence onto the deck.
29 March 2017 Completion date has been pushed back again due to weather conditions. The crossing is now expected to open in late-July or August.

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More information

Official website
Transport Scotland: Forth Replacement Crossing

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With thanks to Allan McPhail, Duncan Macknight, Ian Phillips, Peter, Toby Speight, Neil Kinmont, Michael Pritchard and Gerry McKenna for information on this page.

This scheme was last updated on 29 March 2017.