He was on his way to a meeting in Pembrokeshire when he noticed the woman dangerously close to traffic.
Coleman is said to have driven around Haverfordwest for half an hour to see if the woman could recognise her home, before calling friends in the town to ask for help.
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A top health boss has told ITV News that change is needed to hospital services in north Wales, that could include A&E.
A fine and bright start to the week, with any lingering rain clearing away as we move throughout the afternoon.
A wet and windy night to come, with rain turning heavier overnight. Feeling particularly blustery in coastal areas.