Chapter 4: Road Network
Chapter 4: Road Network
1. Introduction
1.1 This chapter provides information about public road lengths by local authority, road class, type and speed limit. It also includes statistics on the amount of trunk road constructed/re-surfaced and information on the residual life of the trunk road network.
1.2. Unusual year to year changes in the reported road lengths may be due to the gradual introduction of Geographical Information Systems (GIS) to calculate road lengths by the data providers- see Notes and Definitions section, page 245.
Key Points
- Scotland has 56,092 km of road network
- Six per cent is trunk road (1% is motorway)
- Scotland has 10.4 km of road per 1,000 people compared to 6.3 km in GB.
2. Main Points
Road length
2.1 There were 56,092 kilometres of public road in Scotland at 31 March 2016. The trunk road network accounted for 6% of the total. Other (non-trunk) A roads represented 13% of the total. Minor roads (B and C roads, and unclassified roads) accounted for the remaining 81% of roads. (Table 4.1)
2.2 The length of the motorway network remained the same between April 2015 and April 2016. (Table 4.1)
2.3 Over a quarter of the total trunk road network, and about one-seventh of the Scottish road network, is within the area of the Highland Council. Around 10% of the Scottish road network is within the Aberdeenshire Council area and a further 8% is within the Dumfries and Galloway Council area. These three Local Authorities account for almost a third of Scotland’s road network. (Table 4.2)
Road Maintenance
2.4 Overall there was a decrease of 2% in the amount of trunk road that was newly constructed, reconstructed, strengthened or surface dressed in 2015-16 compared to the previous year. (Table 4.3)
2.5 In 2015-16, 21.7% of the motorway network, 11% of the dual carriageway and 12% of the single carriageway trunk road network required close monitoring of the state of the road surface. (Table 4.5 (b))
2.6 In 2015-16 the National Road Condition Indicator (RCI) showed 29% of the local authority A road network may, following more detailed examination, require some kind of maintenance (see the Notes and Definitions section, page 246). For the whole of the local authority network (all road categories), about 36% may similarly require some kind of maintenance. (Table 4.6)
2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |
Trunk roads 3, 6 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Motorways | Kilometres | ||||||||||
Excluding slip roads | 377 | 392 | 392 | 392 | 390 | 389 | 397 | 420 | 420 | 420 | 420 |
Including slip roads | 525 | 546 | 547 | 547 | 546 | 544 | 558 | 598 | 598 | 600 | 601 |
A roads | |||||||||||
Dual carriageway | 524 | 531 | 521 | 521 | 523 | 523 | 523 | 513 | 513 | 504 | 504 |
Single carriageway | 2,351 | 2,330 | 2,323 | 2,323 | 2,332 | 2,327 | 2,317 | 2,316 | 2,314 | 2,326 | 2,326 |
Other inc slips/roundabout | 105 | 111 | 114 | 114 | 119 | 123 | 125 | 126 | 126 | 141 | 147 |
Total | 2,980 | 2,972 | 2,958 | 2,958 | 2,974 | 2,974 | 2,965 | 2,955 | 2,953 | 2,970 | 2,977 |
by speed limit: | |||||||||||
up to 40 mph | 238 | 232 | 229 | 229 | 226 | 233 | 230 | 227 | 227 | 239 | 243 |
over 40 mph | 2,742 | 2,740 | 2,730 | 2,730 | 2,748 | 2,740 | 2,735 | 2,727 | 2,725 | 3,331 | 3,335 |
All trunk roads 3,4 | 3,505 | 3,518 | 3,505 | 3,505 | 3,520 | 3,518 | 3,523 | 3,553 | 3,551 | 3,570 | 3,578 |
Local Authority major roads 7 | |||||||||||
Motorways | |||||||||||
Excluding slip roads | - | - | - | - | - | - | - | - | - | - | - |
Including slip roads | - | - | - | - | - | - | - | - | - | - | - |
A roads | |||||||||||
Dual carriageway 5 | 245 | 242 | 242 | | 243 | 243 | | 229 | 232 | 268 | 270 | 272 | 272 |
Single carriageway 5 | 7,188 | 7,182 | 7,139 | | 7,178 | 7,178 | | 7,185 | 7,235 | 7,204 | 7,203 | 7,134 | 7,142 |
Total | 7,433 | 7,424 | 7,381 | | 7,421 | 7,421 | | 7,414 | 7,467 | 7,473 | 7,473 | 7,406 | 7,414 |
by speed limit: | |||||||||||
up to 40 mph | 1,453 | 1,485 | 1,491 | 1,515 | 1,508 | 1,509 | 1,559 | 1,567 | 1,572 | 1,616 | 1,621 |
over 40 mph | 5,980 | 5,939 | 5,889 | 5,906 | 5,913 | 5,905 | 5,907 | 5,906 | 5,901 | 5,791 | 5,792 |
All LA major roads4 | 7,433 | 7,424 | 7,381 | 7,421 | 7,421 | 7,414 | 7,467 | 7,473 | 7,473 | 7,406 | 7,414 |
Local Authority minor roads 7 | |||||||||||
B roads | |||||||||||
limit up to 40 mph | 1,096 | 1,141 | 1,152 | 1,174 | 1,176 | 1,170 | 1,189 | 1,194 | 1,194 | 1,228 | 1,226 |
limit over 40 mph | 6,361 | 6,318 | 6,349 | 6,292 | 6,318 | 6,311 | 6,310 | 6,309 | 6,305 | 6,270 | 6,276 |
Total | 7,458 | 7,459 | 7,501 | 7,466 | 7,493 | 7,481 | 7,499 | 7,504 | 7,500 | 7,498 | 7,502 |
C roads | |||||||||||
limit up to 40 mph | 1,276 | 1,353 | 1,266 | 1,576 | 1,556 | 1,555 | 1,582 | 1,586 | 1,593 | 1,621 | 1,653 |
limit over 40 mph | 9,059 | 9,065 | 9,104 | 9,091 | 9,102 | 9,098 | 9,105 | 9,104 | 9,098 | 9,060 | 9,051 |
Total | 10,336 | 10,419 | 10,371 | 10,667 | 10,658 | 10,653 | 10,687 | 10,690 | 10,691 | 10,681 | 10,703 |
Unclassified roads | |||||||||||
limit up to 40 mph | 14,399 | 14,465 | 14,768 | 14,573 | 14,714 | 14,828 | 14,856 | 14,948 | 15,020 | 15,097 | 15,198 |
limit over 40 mph | 11,716 | 11,683 | 11,661 | 11,712 | 11,726 | 11,732 | 11,727 | 11,732 | 11,728 | 11,735 | 11,696 |
Total | 26,115 | 26,148 | 26,429 | 26,285 | 26,440 | 26,560 | 26,583 | 26,680 | 26,748 | 26,832 | 26,895 |
All LA minor roads | 43,909 | 44,026 | 44,300 | 44,418 | 44,591 | 44,694 | 44,769 | 44,873 | 44,938 | 45,011 | 45,100 |
All roads (trunk and LA) 3 | |||||||||||
Motorways | |||||||||||
Excluding slip roads | 377 | 392 | 392 | 392 | 390 | 389 | 397 | 420 | 420 | 420 | 420 |
Including slip roads | 525 | 546 | 547 | 547 | 546 | 544 | 558 | 598 | 598 | 600 | 601 |
A, B and C roads | |||||||||||
Dual carriageway 5 | 769 | 773 | 763 | | 764 | 766 | | 752 | 755 | 781 | 783 | 776 | 775 |
Single carriageway 5 | 27,332 | 27,390 | 27,333| | 27,634 | 27,661 | | 27,646 | 27,737 | 27,713 | 27,706 | 27,639 | 27,674 |
Total | 28,206 | 28,274 | 28,210 | 28,512 | 28,546 | 28,522 | 28,617 | 28,620 | 28,615 | 28,556 | 28,596 |
by speed limit: | |||||||||||
up to 40 mph | 4,064 | 4,212 | 4,138 | 4,494 | 4,465 | 4,467 | 4,560 | 4,574 | 4,586 | 4,704 | 4,743 |
over 40 mph | 24,143 | 24,062 | 24,073 | 24,019 | 24,081 | 24,054 | 24,057 | 24,046 | 24,029 | 24,451 | 24,455 |
Unclassified roads | |||||||||||
limit up to 40 mph | 14,399 | 14,465 | 14,768 | 14,573 | 14,714 | 14,828 | 14,856 | 14,948 | 15,020 | 15,097 | 15,198 |
limit over 40 mph | 11,716 | 11,683 | 11,661 | 11,712 | 11,726 | 11,732 | 11,727 | 11,732 | 11,728 | 11,735 | 11,696 |
Total | 26,115 | 26,148 | 26,429 | 26,285 | 26,440 | 26,560 | 26,583 | 26,680 | 26,748 | 26,832 | 26,895 |
All roads 3,4 | 54,847 | 54,968 | 55,186 | 55,344 | 55,532 | 55,626 | 55,758 | 55,898 | 55,962 | 55,987 | 56,092 |
Source: Transport Scotland - Not National Statistics
1. Motorway road lengths are derived from GIS from 2000 onwards - see commentary for more details.
2. Road lengths are physical length rather than carriageway length e.g. 10km of dual carriageway counts as 10km, not 20km.
3. These figures now include A road slip roads which have been excluded from the figures in previous publications. The time series has been updated to include this data resulting in an increase of 3-4% in Trunk road length and an increase in overall road length of 0.2%. The methodology for calculating the trunk road totals from the database has also changed resulting in some small changes to road lengths from those previously published.
4.Trunk road lengths for these roads have now been derived more accurately using a GIS system from 2006.
5. For 2008 and 2009 single and dual carriageways figures are estimated.
6. As at 30 May 2014.
7. Local authority road lengths at the end of the financial year e.g. 2013=2013/14.
Council | Trunk 3 | Local Authority 2,5 | Total | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Motorway 1 | Motorway slips | A Roads | Total | A Roads | B Roads | C Roads | Unclassified | Total | ||
kilometres | ||||||||||
Aberdeen City | - | - | 24 | 24 | 58 | 42 | 93 | 720 | 913 | 937 |
Aberdeenshire | - | - | 177 | 177 | 687 | 799 | 1,540 | 2,485 | 5,510 | 5,687 |
Angus | - | - | 53 | 53 | 193 | 255 | 489 | 875 | 1,811 | 1,864 |
Argyll & Bute | - | - | 296 | 296 | 505 | 614 | 434 | 730 | 2,283 | 2,579 |
Clackmannanshire | - | - | 1 | 1 | 49 | 34 | 28 | 177 | 288 | 289 |
Dumfries & Galloway | 59 | 14 | 273 | 347 | 494 | 735 | 1,178 | 1,757 | 4,164 | 4,511 |
Dundee City | - | - | 18 | 18 | 36 | 17 | 96 | 414 | 563 | 580 |
East Ayrshire | 11 | 4 | 56 | 70 | 124 | 193 | 211 | 625 | 1,154 | 1,223 |
East Dunbartonshire | - | 59 | 59 | 54 | 47 | 34 | 370 | 505 | 565 | |
East Lothian | - | - | - | - | 95 | 169 | 223 | 444 | 931 | 931 |
East Renfrewshire | 9 | 3 | 10 | 22 | 31 | 50 | 83 | 310 | 474 | 496 |
Edinburgh, City of | 15 | 12 | 35 | 61 | 135 | 51 | 119 | 1,110 | 1,415 | 1,476 |
Eilean Siar | - | - | - | 340 | 177 | 189 | 486 | 1,191 | 1,191 | |
Falkirk | 39 | 13 | 4 | 56 | 114 | 96 | 118 | 642 | 971 | 1,027 |
Fife | 16 | 6 | 96 | 118 | 322 | 325 | 352 | 1,407 | 2,406 | 2,523 |
Glasgow, City of | 52 | 48 | 2 | 102 | 135 | 64 | 209 | 1,403 | 1,811 | 1,913 |
Highland | - | - | 959 | 959 | 1,391 | 976 | 1,440 | 2,936 | 6,743 | 7,702 |
Inverclyde | - | - | 28 | 28 | 24 | 23 | 54 | 268 | 369 | 397 |
Midlothian | - | - | 35 | 35 | 93 | 100 | 101 | 387 | 680 | 716 |
Moray | - | - | 99 | 99 | 157 | 296 | 366 | 735 | 1,555 | 1,654 |
North Ayrshire | - | - | 68 | 68 | 101 | 155 | 207 | 572 | 1,035 | 1,103 |
North Lanarkshire 4 | 42 | 19 | 25 | 86 | 147 | 143 | 246 | 1,030 | 1,567 | 1,653 |
Orkney Islands | - | - | - | 161 | 205 | 160 | 458 | 984 | 984 | |
Perth & Kinross | 39 | 13 | 208 | 260 | 435 | 367 | 638 | 1,047 | 2,487 | 2,748 |
Renfrewshire | 18 | 11 | 26 | 55 | 65 | 62 | 140 | 554 | 821 | 876 |
Scottish Borders | - | - | 140 | 140 | 459 | 599 | 768 | 1,143 | 2,970 | 3,110 |
Shetland Islands | - | - | - | 225 | 162 | 199 | 464 | 1,049 | 1,049 | |
South Ayrshire | - | - | 92 | 92 | 108 | 209 | 232 | 622 | 1,170 | 1,263 |
South Lanarkshire | 65 | 20 | 54 | 139 | 267 | 251 | 445 | 1,308 | 2,271 | 2,410 |
Stirling | 21 | 6 | 116 | 143 | 212 | 161 | 170 | 472 | 1,015 | 1,159 |
West Dunbartonshire | - | - | 23 | 23 | 46 | 8 | 27 | 293 | 375 | 397 |
West Lothian | 33 | 12 | - | 46 | 152 | 117 | 116 | 651 | 1,036 | 1,082 |
Total | 420 | 181 | 2,977 | 3,578 | 7,414 | 7,502 | 10,703 | 26,895 | 52,514 | 56,092 |
percentages | ||||||||||
Aberdeen City | - | - | 0.8 | 0.7 | 0.8 | 0.6 | 0.9 | 2.7 | 1.7 | 1.7 |
Aberdeenshire | - | - | 5.9 | 4.9 | 9.3 | 10.6 | 14.4 | 9.2 | 10.5 | 10.1 |
Angus | - | - | 1.8 | 1.5 | 2.6 | 3.4 | 4.6 | 3.3 | 3.4 | 3.3 |
Argyll & Bute | - | - | 10.0 | 8.3 | 6.8 | 8.2 | 4.1 | 2.7 | 4.3 | 4.6 |
Clackmannanshire | - | - | - | 0.0 | 0.7 | 0.5 | 0.3 | 0.7 | 0.5 | 0.5 |
Dumfries & Galloway | 14.1 | 8.0 | 9.2 | 9.7 | 6.7 | 9.8 | 11.0 | 6.5 | 7.9 | 8.0 |
Dundee City | - | - | 0.6 | 0.5 | 0.5 | 0.2 | 0.9 | 1.5 | 1.1 | 1.0 |
East Ayrshire | 2.5 | 2.0 | 1.9 | 2.0 | 1.7 | 2.6 | 2.0 | 2.3 | 2.2 | 2.2 |
East Dunbartonshire | - | - | - | 1.7 | 0.7 | 0.6 | 0.3 | 1.4 | 1.0 | 1.0 |
East Lothian | - | - | 0.0 | 0.0 | 1.3 | 2.3 | 2.1 | 1.7 | 1.8 | 1.7 |
East Renfrewshire | 2.2 | 1.6 | 0.3 | 0.6 | 0.4 | 0.7 | 0.8 | 1.2 | 0.9 | 0.9 |
Edinburgh, City of | 3.5 | 6.3 | 1.2 | 1.7 | 1.8 | 0.7 | 1.1 | 4.1 | 2.7 | 2.6 |
Eilean Siar | - | - | - | 0.0 | 4.6 | 2.4 | 1.8 | 1.8 | 2.3 | 2.1 |
Falkirk | 9.4 | 7.4 | 0.1 | 1.6 | 1.5 | 1.3 | 1.1 | 2.4 | 1.8 | 1.8 |
Fife | 3.7 | 3.2 | 3.2 | 3.3 | 4.3 | 4.3 | 3.3 | 5.2 | 4.6 | 4.5 |
Glasgow, City of | 12.4 | 26.5 | 0.1 | 2.9 | 1.8 | 0.8 | 2.0 | 5.2 | 3.4 | 3.4 |
Highland | - | - | 32.2 | 26.8 | 18.8 | 13.0 | 13.5 | 10.9 | 12.8 | 13.7 |
Inverclyde | - | - | 0.9 | 0.8 | 0.3 | 0.3 | 0.5 | 1.0 | 0.7 | 0.7 |
Midlothian | - | - | 1.2 | 1.0 | 1.2 | 1.3 | 0.9 | 1.4 | 1.3 | 1.3 |
Moray | - | - | 3.3 | 2.8 | 2.1 | 4.0 | 3.4 | 2.7 | 3.0 | 2.9 |
North Ayrshire | - | - | 2.3 | 1.9 | 1.4 | 2.1 | 1.9 | 2.1 | 2.0 | 2.0 |
North Lanarkshire | 10.0 | 10.7 | 0.8 | 2.4 | 2.0 | 1.9 | 2.3 | 3.8 | 3.0 | 2.9 |
Orkney Islands | - | - | - | 0.0 | 2.2 | 2.7 | 1.5 | 1.7 | 1.9 | 1.8 |
Perth & Kinross | 9.2 | 7.4 | 7.0 | 7.3 | 5.9 | 4.9 | 6.0 | 3.9 | 4.7 | 4.9 |
Renfrewshire | 4.4 | 5.8 | 0.9 | 1.5 | 0.9 | 0.8 | 1.3 | 2.1 | 1.6 | 1.6 |
Scottish Borders | - | - | 4.7 | 3.9 | 6.2 | 8.0 | 7.2 | 4.3 | 5.7 | 5.5 |
Shetland Islands | - | - | - | 0.0 | 3.0 | 2.2 | 1.9 | 1.7 | 2.0 | 1.9 |
South Ayrshire | - | - | 3.1 | 2.6 | 1.5 | 2.8 | 2.2 | 2.3 | 2.2 | 2.3 |
South Lanarkshire | 15.5 | 10.8 | 1.8 | 3.9 | 3.6 | 3.3 | 4.2 | 4.9 | 4.3 | 4.3 |
Stirling | 5.1 | 3.5 | 3.9 | 4.0 | 2.9 | 2.1 | 1.6 | 1.8 | 1.9 | 2.1 |
West Dunbartonshire | - | - | 0.8 | 0.6 | 0.6 | 0.1 | 0.3 | 1.1 | 0.7 | 0.7 |
West Lothian | 8.0 | 6.8 | - | 1.3 | 2.1 | 1.6 | 1.1 | 2.4 | 2.0 | 1.9 |
Total | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
Source: Transport Scotland - Not National Statistics
1. Motorway road lengths have been consolidated using a GIS system which means that there will be some changes to previously published figures.
2. Triangulation with other sources of road length data has occurred to improve the quality of the information. Figures may not be comparable with previous editions.
3. As at 30 May 2014.
4. The drop in the length of trunk A roads from last year is probably due to the detrunking of A80 with the opening of the M80.
5. Local authority road lengths at the end of the financial year.
2005-06 | 2006-07 | 2007-08 | 2008-09 | 2009-10 | 2010-11 | 2011-12 | 2012-13 | 2013-14 | 2014-15 | 2015-16 (prov) | |
Equivalent road lane length | lane-kilometres (estimated) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
New roads | |||||||||||
constructed/opened | 108 | 7 | - | 58 | - | 52 | 132 | - | 18 | 3 | 3 |
Reconstructed | 142 | 114 | 80 | 56 | 51 | 27 | 57 | 1 | 9 | 7 | - |
Strengthened | 280 | 324 | 170 | 194 | 213 | 239 | 168 | 338 | 360 | 365 | 373 |
Surface dressed | 66 | 88 | 79 | 123 | 30 | 35 | 10 | 21 | 11 | 14 | 5 |
Total | 596 | 533 | 329 | 431 | 294 | 353 | 367 | 360 | 398 | 389 | 381 |
Percentages of total | percentages | ||||||||||
New roads | |||||||||||
constructed/opened | 18 | 1 | - | 13 | - | 15 | 36 | - | 5 | 1 | 1 |
Reconstructed 1 | 24 | 21 | 24 | 13 | 17 | 8 | 16 | 0 | 2 | 2 | - |
Strengthened | 47 | 61 | 52 | 45 | 72 | 68 | 46 | 94 | 90 | 94 | 98 |
Surface dressed | 11 | 17 | 24 | 29 | 10 | 10 | 3 | 6 | 3 | 4 | 1 |
Total | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
Source: Transport Scotland - Not National Statistics
Unit | New road constructed for traffic | Reconstructed | Strengthened | Surface Dressed | Total | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Equivalent road lane length | lane-kilometres (estimated) | ||||||||||
NW | 3 | 3 | 120 | 4 | 130 | ||||||
NE | - | - | 66 | 1 | 67 | ||||||
SW | - | 4 | 89 | 1 | 94 | ||||||
SE | - | - | 86 | 8 | 94 | ||||||
FBOC | - | - | 4 | - | 4 | ||||||
Total | 3 | 7 | 365 | 14 | 389 | ||||||
Percentages of total | percentages | ||||||||||
NW | 100 | - | 43 | - | - | 33 | - | - | 29 | - | 33 |
NE | - | - | - | - | - | 18 | - | - | 7 | - | 17 |
SW | - | - | 57 | - | - | 24 | - | - | 7 | - | 24 |
SE | - | - | - | - | - | 24 | - | - | 57 | - | 24 |
FBOC | - | - | - | - | - | 1 | - | - | - | - | 1 |
Total | 100 | - | 100 | - | - | 100 | - | - | 100 | - | 100 |
Source: Transport Scotland - Not National Statistics
Unit | New road constructed for traffic | Reconstructed | Strengthened | Surface Dressed | Total |
---|---|---|---|---|---|
Equivalent road lane length | lane-kilometres (estimated) | ||||
NW | - | - | 146 | 1 | 147 |
NE | 3 | - | 74 | 2 | 79 |
SW 1 | - | - | 60 | 1 | 61 |
SE 1 | - | - | 87 | 1 | 88 |
FBOC | - | - | 6 | - | 6 |
Total | 3 | - | 373 | 5 | 381 |
Percentages of total | percentages | ||||
NW | - | - | 39 | 20 | 39 |
NE | 100 | - | 20 | 40 | 21 |
SW | - | - | 16 | 20 | 16 |
SE | - | - | 23 | 20 | 23 |
FBOC | - | - | 2 | - | 2 |
Total | 100 | - | 100 | 100 | 100 |
Source: Transport Scotland - Not National Statistics
(a) Residual Life of Pavements (i.e. road surface) as percentage of whole network | ||||||
---|---|---|---|---|---|---|
Residual Life (years) | ||||||
<0 | 0-4 | 5-9 | 10-14 | 15-19 | >19 | |
percentages | ||||||
1997-98 | 11 | 8 | 11 | 8 | 8 | 54 |
1998-99 | 10 | 9 | 9 | 8 | 7 | 57 |
1999-00 | 10 | 8 | 10 | 9 | 10 | 53 |
2000-01 | 9 | 7 | 9 | 8 | 8 | 59 |
2001-02 | 4 | 4 | 7 | 7 | 10 | 68 |
2002-03 | 4 | 4 | 7 | 7 | 11 | 67 |
2003-04 | 4 | 4 | 6 | 7 | 12 | 67 |
2004-05 | 4 | 5 | 6 | 7 | 13 | 65 |
2005-06 | 4 | 4 | 6 | 7 | 15 | 63 |
2006-07 | 5 | 4 | 6 | 7 | 15 | 63 |
2007-08 | 4 | 4 | 7 | 7 | 13 | 65 |
2008-09 | 4 | 4 | 6 | 7 | 11 | 68 |
2009-10 | 5 | 5 | 7 | 8 | 11 | 64 |
2010-11 | 5 | 4 | 6 | 7 | 9 | 69 |
2011-122 | 10 | 7 | 10 | 10 | 11 | 52 |
2012-13 | 13 | 8 | 10 | 10 | 12 | 46 |
2013-14 | 14 | 8 | 10 | 9 | 11 | 49 |
2014-15 | 13 | 7 | 9 | 9 | 12 | 50 |
2015-164 | 12 | 9 | 9 | 9 | 13 | 48 |
Operating Company Areas 2015-16 4 | ||||||
Forth Bridges Unit | 17 | 8 | 11 | 10 | 12 | 42 |
North West Unit | 9 | 7 | 8 | 8 | 12 | 54 |
North East Unit | 11 | 10 | 11 | 9 | 12 | 46 |
South East Unit | 11 | 9 | 9 | 9 | 16 | 46 |
South West Unit | 16 | 9 | 8 | 8 | 13 | 46 |
(b) The proportion of the motorway/dual and single carriageway trunk road network, which require close monitoring 3 | |||
---|---|---|---|
Motorways | Dual carriageways | Single carriageways | |
Requires close monitoring | Requires closemonitoring | Requires closemonitoring | |
% | % | % | |
2002-03 | 7.5 | 5.2 | |
2003-04 | 9.0 | 5.1 | |
2004-05 | 9.2 | 3.9 | |
2005-06 | 6.7 | 3.2 | |
2006-07 | 6.1 | 2.7 | |
2007-08 | 8.2 | 3.9 | |
2008-09 | 4.3 | 4.1 | |
2009-10 | 6.3 | 5.5 | 3.7 |
2010-11 | 6.2 | 3.4 | 4.2 |
2011-122 | 12.9 | 9.1 | 10.3 |
2012-13 | 23.1 | 13.3 | 11.6 |
2013-14 | 23.4 | 15.0 | 10.3 |
2014-15 | 22.9 | 10.4 | 11.3 |
2015-164 | 21.5 | 9.8 | 10.5 |
Operating Company Areas 2015-16 4 | |||
Forth Bridges Unit | 21.1 | 5.2 | - |
North West Unit | - | 9.2 | 9.5 |
North East Unit | 14.9 | 6.2 | 16.4 |
South East Unit | 18.2 | 5.7 | 6.9 |
South West Unit | 21.8 | 16.7 | 12.0 |
Source: Transport Scotland - Not National Statistics
1. Residual life represents the number of years to elapse before the pavement reaches the stage when it may be necessary to undertake relatively more expensive reconstruction rather than strengthening to restore its full life.
2 Method of calculation changed in 2011-12.
3. The part of the network that requires close monitoring is that which has a residual life of less than zero.
Note: it has been decided that surveyed network length is not required as the figures produced are now representative of the whole network as shown in Table 4.1
4. These figures are provisional.
A roads | B roads | C roads | Unclassified | All roads | ||||||
Condition | Condition | Condition | Condition | Condition | ||||||
Red | Amber | Red | Amber | Red | Amber | Red | Amber | Red | Amber | |
(a) in each Council area: 2015-16 | percentage | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Aberdeen City | 2 | 18 | 3 | 21 | 3 | 21 | 4 | 23 | 4 | 22 |
Aberdeenshire | 2 | 21 | 2 | 18 | 2 | 17 | 6 | 25 | 4 | 21 |
Angus | 2 | 18 | 4 | 28 | 4 | 23 | 7 | 25 | 5 | 24 |
Argyll & Bute | 9 | 36 | 17 | 44 | 17 | 42 | 15 | 38 | 15 | 40 |
Clackmannanshire | 2 | 21 | 3 | 26 | 4 | 28 | 8 | 33 | 6 | 30 |
Dumfries & Galloway | 5 | 29 | 5 | 30 | 8 | 34 | 21 | 38 | 12 | 34 |
Dundee City | 2 | 17 | 1 | 21 | 1 | 15 | 6 | 27 | 4 | 23 |
East Ayrshire | 2 | 19 | 5 | 29 | 8 | 32 | 11 | 34 | 8 | 31 |
East Dunbartonshire | 5 | 25 | 4 | 24 | 5 | 23 | 10 | 34 | 8 | 31 |
East Lothian | 4 | 30 | 5 | 32 | 4 | 28 | 5 | 27 | 4 | 28 |
East Renfrewshire | 2 | 17 | 4 | 27 | 7 | 25 | 10 | 35 | 8 | 31 |
Edinburgh, City of | 5 | 24 | 3 | 24 | 5 | 26 | 7 | 31 | 7 | 29 |
Eilean Siar | 8 | 30 | 7 | 33 | 6 | 43 | 8 | 41 | 7 | 37 |
Falkirk | 3 | 25 | 5 | 30 | 4 | 31 | 5 | 29 | 5 | 29 |
Fife | 4 | 23 | 5 | 28 | 3 | 27 | 5 | 29 | 5 | 28 |
Glasgow, City of | 3 | 22 | 2 | 18 | 2 | 17 | 6 | 30 | 5 | 27 |
Highland | 3 | 24 | 6 | 29 | 8 | 31 | 13 | 33 | 9 | 30 |
Inverclyde | 3 | 28 | 5 | 31 | 9 | 35 | 11 | 33 | 10 | 33 |
Midlothian | 2 | 18 | 4 | 24 | 4 | 27 | 5 | 30 | 4 | 27 |
Moray | 2 | 22 | 2 | 21 | 3 | 21 | 5 | 27 | 4 | 24 |
North Ayrshire | 9 | 27 | 4 | 29 | 10 | 38 | 6 | 29 | 7 | 31 |
North Lanarkshire | 2 | 20 | 3 | 24 | 4 | 25 | 6 | 31 | 5 | 29 |
Orkney Islands | 2 | 18 | 2 | 17 | 2 | 13 | 4 | 21 | 3 | 18 |
Perth & Kinross | 6 | 31 | 4 | 32 | 4 | 29 | 6 | 26 | 6 | 29 |
Renfrewshire | 4 | 23 | 4 | 27 | 10 | 29 | 8 | 30 | 7 | 29 |
Scottish Borders | 4 | 28 | 7 | 35 | 7 | 35 | 16 | 42 | 10 | 37 |
Shetland Islands | 2 | 19 | 7 | 27 | 4 | 31 | 14 | 37 | 9 | 30 |
South Ayrshire | 7 | 35 | 10 | 39 | 11 | 33 | 11 | 33 | 10 | 34 |
South Lanarkshire | 2 | 20 | 2 | 21 | 5 | 31 | 7 | 30 | 6 | 28 |
Stirling | 5 | 27 | 8 | 33 | 9 | 33 | 17 | 35 | 11 | 33 |
West Dunbartonshire | 3 | 23 | 3 | 20 | 5 | 25 | 7 | 32 | 6 | 30 |
West Lothian | 1 | 16 | 3 | 22 | 8 | 36 | 3 | 24 | 4 | 24 |
Scotland | 4 | 25 | 6 | 29 | 6 | 28 | 9 | 31 | 7 | 29 |
(b) for Scotland as a whole: 2005-06 to 2015-16 (New RCI Series) 2 | ||||||||||
2005-06 | 4 | 27 | 4 | 28 | 4 | 31 | .. | .. | .. | .. |
2006-07 | 4 | 29 | 4 | 29 | 4 | 32 | .. | .. | .. | .. |
2007-08 | 5 | 29 | 6 | 34 | 5 | 33 | .. | .. | .. | .. |
2008-09 | 5 | 28 | 5 | 34 | 5 | 33 | 7 | 37 | 6 | 34 |
2009-10 | 6 | 30 | 6 | 35 | 5 | 33 | 8 | 39 | 7 | 36 |
2010-11 | 6 | 30 | 7 | 36 | 7 | 35 | 10 | 42 | 8 | 38 |
2011-12 | 6 | 30 | 8 | 36 | 8 | 36 | 8 | 38 | 8 | 36 |
2012-13 | 5 | 24 | 7 | 28 | 7 | 28 | 9 | 30 | 7 | 29 |
2013-14 | 5 | 24 | 7 | 28 | 8 | 28 | 9 | 30 | 8 | 29 |
2014-15 | 5 | 24 | 7 | 29 | 9 | 29 | 9 | 30 | 8 | 29 |
2015-16 | 4 | 25 | 6 | 29 | 6 | 28 | 9 | 31 | 7 | 29 |
(b) for Scotland as a whole: 2002-03 3 to 2007-08 (Old SPI Series) | ||||||||||
2002-03 4 | 9 | 37 | .. | .. | .. | .. | .. | .. | .. | .. |
2003-04 | 7 | 33 | 12 | 45 | 8 | 37 | 18 | 52 | 13 | 45 |
2004-05 5 | 6 | 31 | 10 | 43 | 5 | 31 | 15 | 50 | 11 | 42 |
2005-06 | 6 | 31 | 9 | 40 | 4 | 29 | 14 | 51 | 10 | 42 |
2006-07 | 6 | 34 | 11 | 35 | 5 | 29 | 18 | 57 | 13 | 47 |
2007-08 | 6 | 34 | 10 | 46 | 6 | 36 | 16 | 53 | 12 | 46 |
Source: Scottish Road Maintenance Condition Survey - Not National Statistics
1. From 2007-08 the basis of the statutory road performance indicator in Scotland changed to the UK Standard RCI.
2. While it has been possible, following the change to the indicator, to calculate the equivalent RCI value for all classified roads from 2005-06, it has not been possible to do this in a reliable manner for unclassified roads, owing to a lack of cracking data for those years.
As unclassified roads represent a significant part of the total road network, RCI data for the network is similarly not available for this period
It is important to note that owing to the different formulation, no valid comparison can or should be made between the two series
3. The categories used to indicate the condition of the road are in brief: amber - further investigation should be undertaken to establish if treatment is required red - the road has deteriorated to the point at which it is likely repairs to prolong its future life should be undertaken.
4. Information for 2002-03 is available only for A roads.
5. The SPI figures for Scotland in 2004-05 exclude Glasgow, as the survey in Glasgow was undertaken on a different basis in that year.