Scottish Transport Statistics No 30: 2011 Edition
| Residual Life (years) | Surveyed2,4 Network length (km) |
||||||
|---|---|---|---|---|---|---|---|
| <0 | 0-4 | 5-9 | 10-14 | 15-19 | >19 | ||
| percentages | |||||||
| 1997-98 | 11 | 8 | 11 | 8 | 8 | 54 | 1,285 |
| 1998-99 | 10 | 9 | 9 | 8 | 7 | 57 | 1,461 |
| 1999-00 | 10 | 8 | 10 | 9 | 10 | 53 | 2,123 |
| 2000-01 | 9 | 7 | 9 | 8 | 8 | 59 | 2,545 |
| 2001-02 | 4 | 4 | 7 | 7 | 10 | 68 | 3,617 |
| 2002-03 | 4 | 4 | 7 | 7 | 11 | 67 | 4,048 |
| 2003-04 | 4 | 4 | 6 | 7 | 12 | 67 | 4,048 |
| 2004-05 | 4 | 5 | 6 | 7 | 13 | 65 | 4,048 |
| 2005-06 | 4 | 4 | 6 | 7 | 15 | 63 | 4,048 |
| 2006-07 | 5 | 4 | 6 | 7 | 15 | 63 | 4,048 |
| 2007-08 | 4 | 4 | 7 | 7 | 13 | 65 | 4,048 |
| 2008-09 | 4 | 4 | 6 | 7 | 11 | 68 | 4,048 |
| 2009-10 | 5 | 5 | 7 | 8 | 11 | 64 | 4,048 |
| 2010-11 | 5 | 4 | 6 | 7 | 9 | 69 | 4,108 |
Source: Transport Scotland - Not National Statistics
| Motorways | Dual carriageways | |||
|---|---|---|---|---|
| Requires close monitoring % |
Length 4 of network surveyed (km) |
Requires close monitoring % |
Length 4 of network surveyed (km) |
|
| 2002-03 | 7.5 | 631.5 | 5.2 | 949 |
| 2003-04 | 9.0 | 631.5 | 5.1 | 949 |
| 2004-05 | 9.2 | 631.5 | 3.9 | 949 |
| 2005-06 | 6.7 | 632 | 3.2 | 949 |
| 2006-07 | 6.1 | 632 | 2.7 | 949 |
| 2007-08 | 8.2 | 632 | 3.9 | 949 |
| 2008-09 | 4.3 | 632 | 4.1 | 949 |
| 2009-10 | 6.3 | 632 | 5.5 | 949 |
| 2010-11 | 6.2 | 632 | 3.4 | 949 |
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. Surveyed network is the length of the network which has been surveyed and which was increasing year by year until the target of complete survey coverage was achieved. Therefore, these figures may not represent the current position in each of the years, and apparent year-to-year changes may be due to the expansion of the surveyed network - see paragraph 4.2.2.
3. The part of the network that requires close monitoring is that which has a residual life of less than zero.
4. Network length is carriageway kilometres, i.e. 10km of dual carriageway counts as 20km, hence the difference from Table 5.1.