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Residual life map
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The map above shows that 88% of the asphalt covered motorway network has in excess of five years life.
1 Residual life is defined as the life remaining in the road before it reaches a point at which the rate of deterioration is no longer predictable.
2 The blue lengths shown on the map represent concrete carriageway which is not measured in residual life terms.
3 Where gaps appear on the map, this indicates no motorway route.
| Years | % of motorway network |
Length in km | |
|---|---|---|---|
 |
Less than 0 | 5.2 | 218 |
| 0 to 4 | 6.8 | 286 | |
| Greater than | 4 88.0 | 3686 |
