Motorists in Hertfordshire have expressed significant anger following the implementation of a new mandatory 30mph speed limit on a key route. However, fresh traffic data provides compelling evidence that the controversial measure is already achieving its primary goal of enhancing safety.
Data Shows Significant Drop in Speeds
The Liberal Democrat-run Hertfordshire County Council reduced the limit on the B197 London Road through Woolmer Green from 40mph to 30mph in September 2025. A subsequent traffic survey conducted in October 2025 has revealed that the intervention is having a tangible impact. The data shows that average speeds have fallen by 14 per cent, with most drivers now travelling at or below the new limit.
Council leaders argue this demonstrates that drivers are consciously choosing to travel more slowly, resulting in a calmer and more predictable traffic flow through the village. The council has committed to ongoing monitoring to ensure the benefits are sustained.
Council and Community Hail Safety Success
Councillor Stephen Giles-Medhurst OBE, the Executive Member for Highways, stated the figures are clear proof the change is working. He emphasised that the targeted intervention, developed alongside the local community, is making a real difference.
"This is exactly the kind of outcome we want to see," said Giles-Medhurst. "A simple but effective change making roads safer, more accessible and sustainable for everyone. Slower speeds through Woolmer Green mean it’s safer for pedestrians, cyclists and drivers alike."
School Welcomes Long-Awaited Change
The sentiment is strongly echoed by the local primary school, which has campaigned for the change for years. Mrs Jan Martin, headteacher of St Michael's Primary School in Woolmer Green, championed the new measures.
She highlighted that the reduced speed limit, combined with wider pavements protected by bollards, has greatly improved safety for children and families. "It has encouraged more of our families to walk to school, as they feel safer," Martin added, noting the well-used pedestrian crossings at junctions.
While the move continues to draw criticism from some drivers, the council points to the hard data and community support as validation of its road safety strategy, asserting that its new approach is already paying off.
