Guidance on the use of High Friction Surfacing at Signalised ...

TS Interim Amendment N° 34TRANSPORT SCOTLANDSTANDARDS TRAFFIC AND ECONOMICS BRANCHTS INTERIM AMENDMENT NO 34: USE OF HFS ON LOW SPEED APPROACHES TOSIGNALISED CROSSINGS AND JUNCTIONS ON TRUNK ROADSUMMARYThis Interim Amendment provides guidance on the use of High Friction Surfacing atSignalised Pedestrian Crossings on single carriageway Trunk Roads1. BACKGROUNDDMRB Volume 7 HD36/06 “Surfacing Materials for New and MaintenanceConstruction” Paragraph 3.16 states that,3.16 The same levels of PSV and AAV must beused on different traffic lanes across thecarriageway and in the hardshoulder except that,where aggregates are used for demarcation, amaximum difference of 5 PSV points may beallowed.A practitioner has interpreted this Standard as requiring the use of HFS on both theapproach lane(s) and exit lane(s) from a signalised pedestrian crossing on an urbansingle carriageway road. This goes against successful contemporary urban practice.2. ACTIONParagraph 3.16 is amended as follows for trunk roads in Scotland.3.16 The same levels of PSV and AAV must beused on different traffic lanes across thecarriageway and in the hardshoulder except that,where aggregates are used for demarcation, amaximum difference of 5 PSV points may beallowed. This restriction does not apply whereHFS is used on the approach lane(s) to signalisedpedestrian crossings and junctions on singlecarriageway roads subject to a 40mph or lowerspeed restriction.TS IAN 34 Page 1 of 201 November 2010

TS Interim Amendment N° 343. IMPLEMENTATIONTransport Scotland requires this TS IAN to be distributed immediately to TS Contractors forinformation.4. FURTHER INFORMATIONIf you have any questions regarding the use or content of this TS IAN contact therelevant Transport Scotland Project / Network Manager.TS IAN 34 Page 2 of 201 November 2010