Resistance to wear by the micro-Deval test

Approaches to major and minor junctions on dual carriageways and single carriageways where frequent or sudden braking occurs but in a generally straight line 

Bends (radius 500 m) on all types of road, including motorway link roads other hazards that require combined braking and cornering 

Note Where 68+ material is listed in this table, none of the three most recent results from consecutive PSV tests relating to the aggregate to be supplied must fall below 68. 

For site categories GI /G2, SI /S2 and R, any PSV in the range given for each traffic level may be used for any IL and should be chosen on the basis of local experience of material performance. In the absence of this information, the values given for the appropriate IL and traffic level must be used. 

The traffic level is expressed in terms of the expected commercial vehicles (cv) per lane, per day (cv/lane/day). HFS, specialised high friction surfacing, incorporating calcined bauxite aggregate. 

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