Lincolnshire Road Safety Partnership (LRSP) carried out an archer survey in May 2025 – the Archer Survey was installed on A156, Lea Road, Gainsborough with calibrated technical data recording equipment located on:
- 25050901 – On a lamp post opposite 160
- 25050907 – On a lamp post outside 272
The survey commenced on the 10/05/2025 and continued for a full seven-day period.
Analysis of the speed data showed that the average speed of vehicles was:
1. 25050901: 26.1 mph in a 30-mph limit. The speed data showed evidence that some vehicles were exceeding the speed limit at a speed that would make the drivers liable to action or prosecution by the Police.
2. 25050907: 27.2 mph in a 30-mph limit. The speed data showed evidence that some vehicles were exceeding the speed limit at a speed that would make the drivers liable to action or prosecution by the Police.
Research was undertaken regarding collisions involving personal injury for the last 3-year period up to a data date of 31/05/2025 and there have been 7 recorded collisions. These were not speed related.
Highways engineers within the Road Safety Partnership have assessed the area and informed that no engineering casualty reduction measures were identified.
The Government is committed to ensuring that the process for deploying speed cameras is transparent and that cameras are only used at locations where they can make a demonstrable reduction in speed related casualties. The only form of speed enforcement that the LRSP can carry out is with the use of speed cameras; however, the site selection process has to comply with the criteria set out by the Department for Transport. This criterion includes locations where there is a history of speed related injury collisions supported by evidence of a high degree of non-compliance with the speed limit. In that respect Lincolnshire Police through the Road Safety Partnership adheres to the site selection criteria set out by the Department for Transport to ensure that the process is completely transparent and that cameras are only used as a casualty reduction measure.
The results of the survey together with an analysis of the collision data show that the criteria required for either fixed or mobile speed camera enforcement is not met.
Speed cameras are only one part of Lincolnshire Police Speed Enforcement Strategy, and the details of the surveys have been shared with the Neighbourhood Policing Team and the Roads Policing Unit for them to undertake enforcement when resourcing allows of which we have no control over.
The 85th percentile for driving is a traffic engineering concept used to set speed limits and assess safe driving behaviour. It refers to the speed at or below which 85% of drivers are observed to travel under free-flowing conditions (i.e., no congestion or enforcement influence).
In simpler terms:
If you measured the speed of 100 drivers on a road:
* The 85th fastest driver sets the 85th percentile speed.
* 15% of drivers go faster than this, and 85% go this speed or slower.
The ‘SAW’ refers to those drivers that would fall within the option of receiving a Speed Awareness Course instead of prosecution.