Pembrokeshire County Council staff monitor the weather conditions throughout the day and night, liaising closely with forecasters specifically employed by the Council for this task. In addition there are several road side sensors in the region that measure road temperature and other important factors, relaying this information back to computers used by both the forecasters and highway staff.
The decisions to salt are, where appropriate, subject to factors such as local geography, humidity measurements and wind speeds. The decision is taken by experienced winter maintenance officers in the Council.
Elevated parts of highway, including bridges, and sections lying in low ground are more prone to freezing and usually require special attention.