www.highwaysmagazine.co.uk


Conversely, in some scenarios the recommended spread rates may be higher than those currently used on the network, and authorities may question why they should implement the higher rates if they have historically provided an effective service at the lower rates. For example this can be particularly important where authorities have optimised the spreading routes for treatments at 20g/m² and recommended rates are greater than this.


DECEMBER 2013


The fi rst question that must be asked when authorities are already spreading at lower rates than recommended in the code is, are you confi dent you are spreading at the correct rates? The recommendations in Appendix H are based on making an accurate assessment of spreader performance and salt discharge rates, and following the recommended calibration and monitoring procedures will provide this necessary accuracy.


Ultimately, as has been made clear, the code of practice is not a list of


WINTER MAINTENANCE 25


mandatory requirements but provides guidance for local authorities; however, it is recommended that reasons for adopting different policies are recorded. For example, if lower spread rates are implemented, it is important this is based on reliable historical records, both of the conditions under which treatments have been effective and previous knowledge of the spreader performance, salt type and condition. Authorities must be confi dent there has been no variation in these conditions or performance levels.


*The presentations given at the workshops can be found at:


http://www.nwsrg.org/news/articles/5


For further information visit www.trl.co.uk or email enquiries@trl.co.uk


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