EIR/202600510641 · FOI/EIR · partially withheld
Transport Scotland - Details of Callander traffic survey: EIR release
Information requested
A traffic survey was conducted through Callander’s Main Street and Stirling Road in October 2025.
Under the Freedom if Information (Scotland) Act 2002, we are requesting:
1. The highest recorded speeds across each surveyed location.
2. The lowest recorded speeds across each surveyed location.
3. Please confirm whether all speeds collected within the survey were included when calculating average speeds at each location, or if any were removed and why.
Response
As the information you have requested is 'environmental information' for the purposes of the Environmental Information (Scotland) Regulations 2004 (EIRs), we are required to deal with your request under those Regulations. We are applying the exemption at section 39(2) of the Freedom of Information (Scotland) Act 2002 (FOISA), so that we do not also have to deal with your request under FOISA.
This exemption is subject to the 'public interest test'. Therefore, taking account of all the circumstances of this case, we have considered if the public interest in disclosing the information outweighs the public interest in applying the exemption. We have found that, on balance, the public interest lies in favour of upholding the exemption, because there is no public interest in dealing with the same request under two different regimes. This is essentially a technical point and has no material effect on the outcome of your request.
Q1. You requested the highest recorded speeds across each surveyed location.
A1. The highest Recorded Speeds at each survey location is as follows:
1. 77.4mph 2. 132.12mph 3. 109.23mph 4. 98.81mph 5. 107.58mph 6. 121.09mph 7. 136.83mph 8. 77.89mph 9. 129.91mph
Q2. You requested the lowest recorded speeds across each surveyed location.
A2. Lowest Recorded Speeds at each survey location is as follows:
1. 1.68mph 2. 4.69mph 3. 0.62mph 4. 0.55mph 5. 0.63mph 6. 0.56mph 7. 1.3mph 8. 4.87mph 9. 0.6mph
Q3. You asked for confirmation of whether all speeds collected within the survey were included when calculating average speeds at each location, or if any were removed and why.
A3. No data is removed from the data subset when calculating average speeds. However, Transport Scotland's Operating Company, BEAR Scotland, is aware that anomalies are frequently recorded by the equipment. To explain why this occurs, the subcontractor has provided the below information:
AATC units consist of pneumatic tubes secured across the roadway to measure vehicle speeds and traffic volumes. In some cases, the equipment may record anomalous or incomplete data. This can occur for several reasons, including:
Heavy goods vehicles with multiple axles, where the axle configuration can make it difficult for the unit to accurately classify the vehicle. Slow-moving or queuing traffic, where closely spaced vehicles may prevent the system from clearly identifying individual vehicle types. Simultaneous tube activation by vehicles travelling in opposite directions, which can interfere with the unit’s ability to correctly determine the vehicle classification.
These instances represent a very small proportion of the overall dataset. As such, some of this data may remain within the dataset, as it has no significant impact on the overall averages or conclusions presented in the report.
About FOI
The Scottish Government is committed to publishing all information released in response to Freedom of Information requests. View all FOI responses at https://www.gov.scot/foi-responses.
Contact Please quote the FOI reference Central Correspondence Unit Email: contactus@gov.scot Phone: 0300 244 4000 The Scottish Government St Andrew's House Regent Road Edinburgh EH1 3DG
Detected exemption language
We are applying the exemption at section 39(2) of the Freedom of Information (Scotland) Act 2002 (FOISA), so that we do not also have to deal with your request under FOISA. This exemption is subject to the 'public interest test'. Therefore, taking account of all the circumstances of this case, we have considered if the public interest in disclosing the information outweighs the public interest in applying the exemption. We have found that, on balance, the public interest lies in favour of upholding the exemption, because there is no public interest in dealing with the same request under two different regimes.
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