Road camera directory
Speed Cameras on the A4147
3
Total Cameras
2
Speed Limits
1
Counties
1
Cities
17,303
Peak AADT
10
Collisions (2024)
Interactive camera map
The map loads when it enters view.
Camera Types
Speed Limits
All Cameras on the A4147
Camera directory loaded with 3 records.
| Type | Speed Limit | Road | Location | Daily Traffic | Crashes (500m) |
|---|---|---|---|---|---|
| Fixed | 40 mph | A4147 | Hemel Hempstead | 17,303 | 6 |
| Fixed | — | A4147 | Hemel Hempstead | 9,704 | 1 |
| Fixed | 70 mph | A4147 | Hemel Hempstead | 9,704 | 3 |
Road Safety on the A4147
Unique collisions within 500m of mapped speed cameras on the A4147 (DfT STATS19, 2024).
Collision context
Severity near mapped cameras
1
Fatal · 10%
3
Serious · 30%
6
Slight · 60%
10
unique collisions within 500m
15
casualties · 1.5 per collision
What the figures say
40% of matched collisions were fatal or serious in the 2024 STATS19 dataset.
17,303 vehicles per day at the busiest matched count point across 3 matched count locations.
These are collisions near mapped camera records, not collisions caused or prevented by cameras. Coverage depends on available camera, traffic and STATS19 coordinates.
A4147 · DfT STATS19 2024 and Road Traffic Statistics AADF 2024.
Counties Along the A4147
Frequently Asked Questions
How many speed cameras are on the A4147?
This directory currently maps 3 speed cameras on the A4147, including 3 fixed and 0 average-speed records.
How many crashes occur near speed cameras on the A4147?
In 2024, DfT STATS19 recorded 10 unique collisions within 500m of mapped camera locations on the A4147, including 1 fatal and 3 serious collisions.
How busy is the A4147?
The busiest section of the A4147 near a speed camera carries approximately 17,303 vehicles per day. Source: DfT Road Traffic Statistics.