M90 motorway

Last updated

UK-Motorway-M90.svg
M90
M90 motorway (Great Britain) map.svg
Route information
Part of Tabliczka E15.svg E15
Length36 mi (58 km)
Existed1964–present
HistoryConstructed 1964–2017 [1]
Major junctions
South endJunction 1a of the M9
Major intersections Junction 1a.svg UK-Motorway-M9.svg
M9 motorway
Junction 2.svg UK-Motorway-A823 (M).svg
A823(M) motorway
North end Perth (two ends; one east 56°22′58″N3°24′23″W / 56.3827°N 3.4065°W / 56.3827; -3.4065 (M90 motorway (northern end)) , one at Broxden Junction 56°23′18″N3°29′13″W / 56.3882°N 3.4869°W / 56.3882; -3.4869 (M90 motorway (northern end)) )
Location
Country United Kingdom
Primary
destinations
Edinburgh, Edinburgh Airport, Forth Road Bridge, Dunfermline, Kinross, Perth
Road network
UK-Motorway-M80.svg M80 UK-Motorway-M180.svg M180

The M90 is a motorway in Scotland. It runs from Junction 1A of the M9 motorway, south of the Queensferry Crossing, [2] to Perth. It is the northernmost motorway in the United Kingdom. The northern point goes to the western suburbs of Perth at Broxden. A small part of the M90 (across the Friarton Bridge to the southeast of Perth) was originally numbered as the M85 motorway.

Contents

History

The first section of the M90 opened in 1964 to coincide with the opening of the Forth Road Bridge and Masterton junction (Junction 2). The next section of the M90, the Crossgates – Kelty and Cowdenbeath Bypass, opened on 1 December 1969. [3] The stretch between Kinross and the Milnathort Bypass opened in December 1971. [4]

Two sections were due to begin construction around 1973 and 1974, however, they were put on hold because of the 1973 oil crisis. The section from Arlary (Junction 8 with A91) to Arngask was opened in March 1977. Arngask (Glenfarg) to Muirmont opened in 2 October 1980 [5] connecting with the completed Friarton Bridge (which was originally numbered M85, and opened in 1976 [6] ) and Perth Bypass to Broxden.

The M90 was extended southwards across the Firth of Forth over a new cable-stayed bridge, the Queensferry Crossing, in 2017. A short stretch of the A90 connects the two parts of M90: the short M90 section from the M9 and the much longer M90 section that crosses the Queensferry Crossing and extends to Perth. This short length of the A90 was required at this point as motorway regulations would have prevented certain classes of traffic from using this section of road. [7] [8]

Details

M90, North of Kelty at the boundary between Fife and Perth and Kinross M90 motorway 2005-07-23.jpg
M90, North of Kelty at the boundary between Fife and Perth and Kinross

The M90 leaves the east-west M9 near Kirkliston and heads north. The motorway is interrupted by a short stretch of the A90 from where the A90 from Edinburgh joins the M90. The road continues, however the M90 during this stretch is called the A90. Once it reaches the junction to the south of the Queensferry Crossing the A90 becomes the M90 again at that point. The crossing opened as part of the motorway on 30 August 2017; the bridge is configured as a dual two lane carriageway and has a speed limit of 70 mph (110 km/h). [9]

Previously, the M90's most substantial engineering feature was the Friarton Bridge in Perth, a tall concrete pillared structure which traverses the River Tay. The bridge carries eastbound traffic from Broxden towards Dundee and along the Firth of Tay.

The road constitutes most of the southerly part of the A90 corridor from Edinburgh, through Perth, Dundee and Aberdeen to Peterhead along Scotland's North Sea coast.

A large part of the northern section of the motorway follows the route of the former main railway line between Perth and Edinburgh via Glenfarg, Kinross and the Forth Bridge, which was closed in 1970 despite this not being recommended by the Beeching report.

The Kinross and Milnathort Bypass, the 8-mile (13 km) section of the M90 between Fruix and Arlary, was the first motorway in Britain to be constructed using concrete pavements that were not reinforced. [10] Both the south- and north-bound carriageways have since been overlaid by tarmac.

A sharp turn present on the M90 Fife , The M90 Motorway - geograph.org.uk - 4960663.jpg
A sharp turn present on the M90

Near to its northern terminus, the motorway splits into two branches. The construction of this three-way interchange required the removal of approximately 900,000 cubic metres (32,000,000 cubic feet) of material, which was mostly rock. The motorway bends through in an acute angle, on a compound curve partly of 520.8 m (1,709 ft) and partly of 694.5 m (2,279 ft) in its radius. One branch heads in a north-easterly direction, flowing into the A90 at its end, numbered junction 11 this branch was formerly the M85 motorway, until the A85 was renumbered as A90. The other branch forms part of the western bypass of Perth, and meets the A9 at its end, numbered junction 12. [11] The gradient is 4.57% uphill and 5.65% downhill on this section. The slip roads forming this branch merge with shared priority to allow HGVs (also known as Large Good Vehicles or Heavy Goods Vehicles) to maintain momentum on the steep upgrade. The Broxden to Muirmont slip road at the centre of the interchange has a radius of 136.4 m (448 ft), necessitating maximum superelevation of 7%.

The M90 forms part of the Euroroute E15 which runs from Inverness to Algeciras, however this is not signposted within the UK.

Issues

The M90 lacks hard shoulders for an 8-mile (13 km) section. In this section there are emergency lay-bys (rest areas) at 14-mile (400 m) intervals instead.

The M90 here has another of the tightest corners on the UK motorway network, [12] for which some traffic can be forced to slow down. The corner cuts through the northern side of the Ochil Hills and has a curve radius of 694.5 m (2,279 ft). A recommended minimum of 914 m (2,999 ft) was standard at the time of construction. This corner also coincides with one of the steepest sections of the motorway, [12] for which north-bound HGVs are sign-posted to stay in a low gear and often brake continuously through the turn. South-bound HGVs are normally substantially reduced in speed as they make the incline.

Junctions

CountyLocationmikmJunctionDestinationsNotes
Edinburgh 00 [coord 1] UK-Motorway-M9.svg M9  Edinburgh, Stirling
Queensferry 2.64.11 [coord 2] UK road A90.svg A90  Edinburgh no Eastbound exit or Southbound entrance
4.06.51a [coord 3] UK road A904.svg A904  Queensferry, Newton
Fife 6.710.81b Ferrytoll [coord 4] UK road A9000.svg A9000  Queensferry
B981- Inverkeithing, Rosyth Dockyard
Rosyth 7.712.41c [coord 5] UK road A985.svg A985  Rosyth, Kincardine
B921- Hillend, Kirkaldy
8.213.22 [coord 6] UK-Motorway-A823 (M).svg A823(M)– Rosyth, Dunfermline
Dunfermline 10.617.12a Crossgates [coord 7] UK road A92.svg A92  Glenrothes no Northbound entrance or Southbound exit
11.318.23 Halbeath [coord 8] UK road A92.svg A92  – Glenrothes
UK road A907.svg A907  - Dunfermline
14.923.94 [coord 9] B914- Kelty
Perth and Kinross 17.628.35 [coord 10] B9097- Crook of Devon
Kinross 20.733.36 [coord 11] UK road A977.svg A977  Kinross, Crook of Devon
21.935.27 [coord 12] UK road A91.svg A91  Milnathort, Stirling no Southbound entrance or Northbound exit
24.138.88 [coord 13] UK road A91.svg A91  St Andrews no Northbound entrance or Southbound exit
Bridge of Earn 32.552.39 [coord 14] UK road A912.svg A912  Bridge of Earn, Gateside
34.755.810 [coord 15] UK road A912.svg A912  - PerthMotorway splits into two, southbound entrance and Northbound exit only for A912
Perth 36.058.011 [coord 16] UK road A90.svg A90  Dundee
UK road A85.svg A85  Perth, Oban
On the Eastern branch after the split
60.437.512 [coord 17] UK road A9.svg A9  - Stirling, Inverness
UK road A93.svg A93  perth
On the Western branch after the split
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
Coordinate list
  1. 55°57′18″N3°25′05″W / 55.955°N 3.418°W
  2. 55°58′41″N3°23′02″W / 55.978°N 3.384°W
  3. 55°59′02″N3°25′19″W / 55.984°N 3.422°W
  4. 56°01′16″N3°24′25″W / 56.021°N 3.407°W
  5. 56°02′10″N3°24′29″W / 56.036°N 3.408°W
  6. 56°02′35″N3°24′18″W / 56.043°N 3.405°W
  7. 56°04′19″N3°23′20″W / 56.072°N 3.389°W
  8. 56°04′52″N3°23′49″W / 56.081°N 3.397°W
  9. 56°07′44″N3°23′38″W / 56.129°N 3.394°W
  10. 56°10′01″N3°24′14″W / 56.167°N 3.404°W
  11. 56°12′29″N3°26′10″W / 56.208°N 3.436°W
  12. 56°13′30″N3°25′59″W / 56.225°N 3.433°W
  13. 56°14′20″N3°23′28″W / 56.239°N 3.391°W
  14. 56°20′31″N3°23′49″W / 56.342°N 3.397°W
  15. 56°22′05″N3°25′23″W / 56.368°N 3.423°W
  16. 56°23′02″N3°24′18″W / 56.384°N 3.405°W
  17. 56°23′17″N3°29′10″W / 56.388°N 3.486°W

See also

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References

  1. "Region: Scotland". Archived from the original on 25 July 2013. Retrieved 28 May 2013.
  2. "FRC Bus Lane Map". Transport Scotland . Archived from the original on 29 October 2014. Retrieved 29 October 2014.
  3. Edinburgh Gazette issue 18827
  4. "M90 Kinross and Milnathort Bypass | Roads.org.uk". www.roads.org.uk. 13 December 1971. Retrieved 23 April 2024.
  5. New era as M9O stretch opens By BRIAN McCARTNEY P11, 3 Friday October 1980: The Scotsman
  6. Giles, Graeme (18 January 1994). "End of the road for the M85 motorway". Perthshire Advertiser. Retrieved 14 April 2021.
  7. "Scotland gets it first Managed Motorway". 27 November 2012. Archived from the original on 6 April 2015. Retrieved 18 March 2013.
  8. "FRC junction opens early and under budget | Transport Scotland". Archived from the original on 7 June 2013. Retrieved 24 July 2013.
  9. Carrell, Severin; agency (30 August 2017). "Queensferry Crossing across the Firth of Forth opens to traffic". The Guardian. ISSN   0261-3077 . Retrieved 30 July 2020.
  10. "M90 Inverkeithing to Perth and M85 Perth by-pass". The Motorway Archive. Archived from the original on 8 August 2016. Retrieved 18 December 2015.
  11. M90 J12 Broxden, sabre-roads.org.uk (retrieved 2013-01-16)
  12. 1 2 "M90 | Roads.org.uk". www.roads.org.uk. 4 September 1964. Retrieved 8 August 2023.
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