St Dennis Parish Council Road Safety Monitoring Report
Location: Trelavour Road (Pole 7)
Monitoring Period: 24 March 2026 – 19 May 2026
Overview
During this monitoring period, a mobile Speed Indicator Device (SID) was installed on Trelavour Road to record vehicle movements and speeds in both directions. This is a 20 mph road, so particular attention has been given to how many drivers are travelling at or below the speed limit. The data helps the Parish Council understand driver’s behaviour and identify any road safety concerns.
Traffic Volumes
A total of 61,886 vehicle movements were recorded during the monitoring period.
Incoming vehicles: 26,887
Outgoing vehicles: 34,999
Traffic is heavier in the outgoing direction, although both directions show steady and consistent use of the road.
Typical Speeds
Average speeds are close to the 20 mph limit:
Incoming average speed: 19.15 mph
Outgoing average speed: 21.66 mph
Incoming traffic:
50% of vehicles travel at 18 mph or below
85% of vehicles travel at 21 mph or below
Outgoing traffic:
50% of vehicles travel at 20 mph or below
85% of vehicles travel at 25 mph or below
Vehicles Travelling at or Below 20 mph
As this is a 20 mph road, it is encouraging to see that the majority of incoming vehicles are travelling at or below 20 mph, and around half of outgoing vehicles are travelling at or below this limit. Most remaining vehicles are only slightly above the limit. Overall, most drivers are complying with, or are very close to, the 20 mph speed limit.
Vehicles Travelling Above 20 mph
A proportion of vehicles, especially outbound, travel in the 20 to 25 mph range, with a smaller number travelling above 25 mph. Speeds above 30 mph appear to be relatively uncommon, indicating that while some drivers exceed the limit, most do so only marginally.
Highest Speeds Recorded
Incoming maximum speed: 45 mph
Outgoing maximum speed: 56 mph
These speeds are significantly above the limit but represent isolated incidents rather than typical behaviour.
Key Takeaways
61,886 total vehicle movements recorded
Majority of drivers are travelling at or below 20 mph, particularly inbound
Most other vehicles are travelling only slightly above the speed limit
A small minority exceed 30 mph
Highest recorded speed was 56 mph
Conclusion
The data shows that Trelavour Road is generally being used responsibly, with most drivers travelling at safe speeds appropriate for a 20 mph road. However, there is a tendency for some vehicles, particularly in the outbound direction, to travel slightly above the limit, and a very small number of significantly higher speeds were recorded. The Parish Council will continue to monitor traffic speeds, use SID data to inform road safety decisions, and work with partners where necessary to address any ongoing concerns.
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