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Data Provider: Welsh Government National Statistics Skidding resistance of all Trunk Roads in Wales
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Measure1
Road Classification[Filter]
Skid Resistance[Filter]
Year(Descending)[Filtered]
[Collapse]Motorway[Collapse]All purpose trunk
Click here to sortLane 1 length of networkClick here to sortLane 1 length surveyedClick here to sortLane 1 percentage of length surveyedClick here to sortLane 1 percentage of length surveyed at or below investigatory levelClick here to sortLane 1 length of networkClick here to sortLane 1 length surveyedClick here to sortLane 1 percentage of length surveyedClick here to sortLane 1 percentage of length surveyed at or below investigatory level
2015-1632732610003,2613,071949
2014-1532732710003,2433,193988
2013-143953278303,2183,141987
2012-133953188003,2183,035946
2011-123913027703,1602,934939
2010-113612797713,1083,1081008
2009-10................
2008-093643118503,1042,972969
2007-083643138603,1042,945957
2006-0732532510003,0712,8659317
2005-0632532510013,0712,9799725
2004-0532532510003,0712,9799721
2003-043052969713,0712,9799720
2002-033052989813,0712,987979
2001-023052969703,0713,0199814
2000-013052999803,0713,06010018
1999-20003052999803,0713,06010014

Metadata

Title
Skidding resistance of all Trunk Roads in Wales

Last update
February 2017 February 2017

Next update
December 2017

Publishing organisation
Welsh Government

Source 1
National Roads Maintenance Condition Survey (NRMCS), Department for Transport

Designation
National Statistics

Lowest level of geographical disaggregation
Wales

Geographical coverage
Wales

Data licensing
You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see http://www.nationalarchives.gov.uk/doc/open-government-licence

General description
Skidding resistance relates to wet or damp road surfaces. It is a measure of the road surface condition to the resistance between the vehicle’s tyres and the road when accelerating, braking or cornering. Testing takes place after the road surface has been pre-wetted, as the road surface will exhibit least friction and skid resistance when wet. Testing of dry road surfaces does take place from time to time, however it does not form any part of the routine skid resistance monitoring that takes place on the road network. It is assumed that in dry conditions all clean road surfaces have a high skidding resistance.

Statistical quality
Figures were calculated on a new basis from 2004, which affects all-purpose trunk roads more severely than motorways.
Figures relate to road lengths surveyed in the year and in the previous year (for 2006 and earlier years).
At or below investigatory level’ does not mean the roads are unsafe; it indicates a need for further investigation to determine the need for maintenance of that section of road.
New figures for 2003 were back-calculated to provide a figure equivalent to the new standard used from 2004.
In 2007, for the first time all surveyed lengths are taken from the same year and figures are therefore truly representative of that particular year. Also, Lane 1 length of network has been updated.

Keywords
Road Skidding M4 A-Trunk