Summary of Speed Indicator Device (SID) and Community Speed Watch (CSW) Activity
For the period 2nd December 2023 to 4th March 2024
Location: The SID was positioned at the Homington Primary site from 2nd December 2023 to 23rd January 2024. It was then moved to a new site at the East End of Homington from 30th January until 4th March 2024.
Many thanks to Simon Boxall and Chris Humphreys for their help in mounting and maintaining the SID while it has been in Homington.
Please see the tables below for details of traffic speeds and volumes during this period.
Many thanks to Simon Boxall and Chris Humphreys for their help in mounting and maintaining the SID while it has been in Homington.
Please see the tables below for details of traffic speeds and volumes during this period.
For the latest on Community Speed Watch
For more information regarding approved SID sites in Coombe Bissett and Homington villages please refer to the SID location Power Point guide.
As reported following the previous session at the Homington Primary site, all metrics show continued improvement at this location, with the exception of maximum speeds.
The SID was located at the new site in Homington for the month of February. Traffic entering the village from Nunton was generally well controlled – with average speeds similar to those of traffic entering from Coombe Bissett at the primary SID site, the previous month. Traffic leaving the village is travelling at a higher speed, the percentage of drivers travelling at 36 mph and above is higher and 85th percentile speed is higher – at 34 mph. While all factors show more work has to be done to try and control this group of drivers, it is regretted that speeds are not high enough to warrant Police or Speed Enforcement Team intervention. It has therefore been decided to try and target drivers travelling at excessive speeds during hours when the Community Speed Watch team is permitted to operate. Revised speedwatch sessions will commence from next month.
Detailed PDF reports:
Please refer to the tab for Homington for a more detailed analysis of traffic data recorded by the SID, which is presented in PDF report format. Guidance Notes to each section of the PDF reports are provided below this summary.
Note: Our SID does not have GPS and therefore its reports are location agnostic. References in reports to Incoming and Outgoing traffic refer to traffic coming towards the device (Incoming) and traffic going past the device in the opposite direction (Outgoing).
Please refer to the tab for Homington for a more detailed analysis of traffic data recorded by the SID, which is presented in PDF report format. Guidance Notes to each section of the PDF reports are provided below this summary.
Note: Our SID does not have GPS and therefore its reports are location agnostic. References in reports to Incoming and Outgoing traffic refer to traffic coming towards the device (Incoming) and traffic going past the device in the opposite direction (Outgoing).
Wiltshire Speed Indicator Device Data Sharing Pilot
SID Data Sharing has been rolled out across Wiltshire with effect from 22nd June 2023. There are over 100 SIDs installed in towns and parishes across Wiltshire. 71 communities maintain devices which are now supported under the data sharing initiative. Communities with Evolis and MessageMaker speed signs began submitting their data last year. With effect from January this year, communities with Pandora Technologies and Westcotec speed signs have now been able to submit their data as well. So far, 74% of Evolis SID users, 60% of MessageMaker users, 44% of Pandora users and 40% of Westcotec users have registered and are participating in this initiative. Data from these speed signs is being used to prioritise the deployment of Wiltshire Police’s Speed Enforcement resources (See the section on the CSEO team immediately below).
SID Data Sharing has been rolled out across Wiltshire with effect from 22nd June 2023. There are over 100 SIDs installed in towns and parishes across Wiltshire. 71 communities maintain devices which are now supported under the data sharing initiative. Communities with Evolis and MessageMaker speed signs began submitting their data last year. With effect from January this year, communities with Pandora Technologies and Westcotec speed signs have now been able to submit their data as well. So far, 74% of Evolis SID users, 60% of MessageMaker users, 44% of Pandora users and 40% of Westcotec users have registered and are participating in this initiative. Data from these speed signs is being used to prioritise the deployment of Wiltshire Police’s Speed Enforcement resources (See the section on the CSEO team immediately below).
Please see the following brief video of the SID data sharing initiative prepared by the OPCC Communications team.
www.instagram.com/reel/CvwhcGzMjFt/?igshid=MTc4MmM1YmI2Ng==
And you can launch the attached PDF to look at the Roll-out presentation for the SID Data Sharing initiative which was prepared and presented by John Derryman, Office of the Police and Crime Commissioner, Wiltshire.
www.instagram.com/reel/CvwhcGzMjFt/?igshid=MTc4MmM1YmI2Ng==
And you can launch the attached PDF to look at the Roll-out presentation for the SID Data Sharing initiative which was prepared and presented by John Derryman, Office of the Police and Crime Commissioner, Wiltshire.
sid_data_roll-out_-_final_pdf.pdf |
Community Speed Enforcement Officer (CSEO) Team
The CSEO team have been conducting roadside speed enforcement sessions in Coombe Bissett, using the CSW Deegan House location. Debbi Hide of the CSEO team advises she has carried out speed checks at 9:30 to 10:30 am; 12 pm to 1 pm and 2 pm to 3 pm. A summary of CSEO reports is as follows: |
Community Speed Watch (CSW) Update
A total of 19 Speed Watch sessions were conducted between 1st December 2023 and 1st March 2024
A combination of a reduction in team strength and bad weather has resulted in a noticeable decrease in the number of sessions held over the period. Sites affected are Deegan House and Tottens Farm. We averaged 1.5 sessions a week between 1st December 2023 and 4th March 2024 compared to 2.2 per week sessions previously. Similarly, only 90 instances of speeding were reported compared to 302 instances reported during the previous period. That said, it should be noted that the number of speeders per session has reduced in the past 3 years. At Deegan House, from June to July 2021 we averaged 24.8 speeders per speed watch session. Our current average is 13.5 speeders, and in the previous report it was 9.2 speeders per session at this site. Our observation is that the work of the Community Speed Enforcement Team at Deegan House is a major contributor to this significant reduction of speeders we have had to report. It is pleasing to note that although the CSEO team does not regularly conduct sessions at our other CSW sites, the number of speeders reported by our own CSW team has approximately halved at those locations as well.
This would suggest that the efforts by the Police and Crime Commissioner’s team and Wiltshire Police to improve road safety across Wiltshire are showing positive results.
More information on the work being done by Wiltshire Police and the Police and Crime Commissioner and his team is available on the PCC’s website. Please use the following Link
www.wiltshire-pcc.gov.uk/about-us/campaigns/road-safety/#
This would suggest that the efforts by the Police and Crime Commissioner’s team and Wiltshire Police to improve road safety across Wiltshire are showing positive results.
More information on the work being done by Wiltshire Police and the Police and Crime Commissioner and his team is available on the PCC’s website. Please use the following Link
www.wiltshire-pcc.gov.uk/about-us/campaigns/road-safety/#
We continue to try and cover as much of the community as possible. As you can see, we have been unable to run CSW sessions in some sites and the number of sessions at other locations has fallen due to a lack of volunteers. If you would like to become part of the Community Speed Watch team and help us in our efforts to improve road safety in the parish, please don’t hesitate to call Adrian Turnbull on 07747 620210 or email me at turnbull_adrian@hotmail.com .
Thank You!
Thank You!
NOTE EXPLAINING INFORMATION IN PDF REPORTS
OF SPEED INDICATOR DEVICE (SID) ACTIVITY
COVER PAGE
The start and end dates for the period the device has been active at a location are shown on all pages.
Location: Records where the SID device was positioned during the report period and is shown on all pages.
Note: The Parish Council agreed that the SID should serve as much of the community as possible. Sites have had to be agreed by Wiltshire Council. At present there are a total of 7 approved sites. Details of exactly where each site is located are available in a separate document.
Comments: Details here show the speed limit for the site where the SID was located and the direction of traffic the SID was monitoring at that location:
- Inbound relates to traffic coming into the village
- Outbound relates to traffic leaving the village
The Comments section also states whether the sign was actively displaying the speed information to oncoming traffic or if it was in ‘Spy Mode’. Spy Mode records traffic information but does not display speeds, and is used to baseline traffic speeds at the start of the period.
PAGE TWO: AVERAGE SPEEDS
The Average Speeds graph includes two averages:
- An ‘average by time period’, which is displayed as a curve on the graph. (one curve per direction: ingoing/outgoing).
- An overall average which is displayed as a numeric value just below the graph.
The ‘average by time period’ corresponds to the arithmetic average calculated on the speeds recorded between the start/end dates. They are presented on a default time period of 30 minutes. The overall average corresponds to the arithmetic average of all the speeds included between the starting/ending dates on the time period selected for the PDF report. The software sums up all of the recorded speeds, then divides the result by the number of vehicles measured.
Note: References in the PDF report to Incoming direction and Outgoing direction relate to the direction of traffic in relation to the SID. ‘Incoming’ relates to traffic heading towards the device. ‘Outgoing’ relates to traffic going past the device in the opposite direction
PAGE THREE: MAXIMUM SPEEDS
Similar to the information for average speeds, the graphs relating to maximum speeds are displayed in curve and number format.
- The maximum speed recorded per time period are displayed in graph form (oncoming and outgoing are reflected in different colours).
- The maximum speed recorded over the entire time period is shown for each direction as a numeric value just below the graph.
PAGE FOUR: VEHICLES PER HOUR
Graphs show traffic volumes for incoming traffic (Green) and outgoing traffic (Blue) for each 24-hour period covered by the report. Total volumes are shown at the top right of the graph
PAGE FIVE: SPEED DISTRIBUTION FOR INCOMING TRAFFIC
PAGE SIX: SPEED DISTRIBUTION FOR OUTGOING TRAFFIC
In these sections, the recorded speeds are represented in pie chart form, and allow you to see the percentage of vehicles which have, or have not, observed the speed limit.
The first segment shows the percentage of vehicles which are travelling below or at the legal speed limit in that location. The second segment shows the percentage of vehicles which are travelling above the legal limit but approximately within the speed tolerances permitted by Wiltshire Police and Community Speed Watch before drivers may be sanctioned. The remaining segments show the percentage of vehicles travelling at excessive speeds.
PAGE SEVEN: PERCENTILES FOR INCOMING TRAFFIC
PAGE EIGHT: PERCENTILES FOR OUTGOING TRAFFIC
The 85th percentile is an indicator that helps illustrate the behaviour of the majority of drivers. It reflects the speed respected by 85% of motorists and is obtained by stripping out the bottom and top & bottom 7.5% of speeds recorded (i.e. strips out the extremely fast and extremely slow vehicles).
If the 85% threshold is close to the average speed recorded, this indicates that the speeds observed on a road are consistent. If it is not close to the average speed, this means that a significant proportion of drivers are above the average recorded speed.
Note: Wiltshire Police use 85th Percentile speeds to determine whether they should conduct their own Speed Checks in any location. This is normally determined by the use of a Traffic Speed Survey which is sometimes referred to as a Metro Count. It involves two rubber strips placed across the road connected to a recording device. To-date, the Parish Council have had to request Speed Traffic Survey reports on a case by case basis, before any Police enforcement action will be considered.
The start and end dates for the period the device has been active at a location are shown on all pages.
Location: Records where the SID device was positioned during the report period and is shown on all pages.
Note: The Parish Council agreed that the SID should serve as much of the community as possible. Sites have had to be agreed by Wiltshire Council. At present there are a total of 7 approved sites. Details of exactly where each site is located are available in a separate document.
Comments: Details here show the speed limit for the site where the SID was located and the direction of traffic the SID was monitoring at that location:
- Inbound relates to traffic coming into the village
- Outbound relates to traffic leaving the village
The Comments section also states whether the sign was actively displaying the speed information to oncoming traffic or if it was in ‘Spy Mode’. Spy Mode records traffic information but does not display speeds, and is used to baseline traffic speeds at the start of the period.
PAGE TWO: AVERAGE SPEEDS
The Average Speeds graph includes two averages:
- An ‘average by time period’, which is displayed as a curve on the graph. (one curve per direction: ingoing/outgoing).
- An overall average which is displayed as a numeric value just below the graph.
The ‘average by time period’ corresponds to the arithmetic average calculated on the speeds recorded between the start/end dates. They are presented on a default time period of 30 minutes. The overall average corresponds to the arithmetic average of all the speeds included between the starting/ending dates on the time period selected for the PDF report. The software sums up all of the recorded speeds, then divides the result by the number of vehicles measured.
Note: References in the PDF report to Incoming direction and Outgoing direction relate to the direction of traffic in relation to the SID. ‘Incoming’ relates to traffic heading towards the device. ‘Outgoing’ relates to traffic going past the device in the opposite direction
PAGE THREE: MAXIMUM SPEEDS
Similar to the information for average speeds, the graphs relating to maximum speeds are displayed in curve and number format.
- The maximum speed recorded per time period are displayed in graph form (oncoming and outgoing are reflected in different colours).
- The maximum speed recorded over the entire time period is shown for each direction as a numeric value just below the graph.
PAGE FOUR: VEHICLES PER HOUR
Graphs show traffic volumes for incoming traffic (Green) and outgoing traffic (Blue) for each 24-hour period covered by the report. Total volumes are shown at the top right of the graph
PAGE FIVE: SPEED DISTRIBUTION FOR INCOMING TRAFFIC
PAGE SIX: SPEED DISTRIBUTION FOR OUTGOING TRAFFIC
In these sections, the recorded speeds are represented in pie chart form, and allow you to see the percentage of vehicles which have, or have not, observed the speed limit.
The first segment shows the percentage of vehicles which are travelling below or at the legal speed limit in that location. The second segment shows the percentage of vehicles which are travelling above the legal limit but approximately within the speed tolerances permitted by Wiltshire Police and Community Speed Watch before drivers may be sanctioned. The remaining segments show the percentage of vehicles travelling at excessive speeds.
PAGE SEVEN: PERCENTILES FOR INCOMING TRAFFIC
PAGE EIGHT: PERCENTILES FOR OUTGOING TRAFFIC
The 85th percentile is an indicator that helps illustrate the behaviour of the majority of drivers. It reflects the speed respected by 85% of motorists and is obtained by stripping out the bottom and top & bottom 7.5% of speeds recorded (i.e. strips out the extremely fast and extremely slow vehicles).
If the 85% threshold is close to the average speed recorded, this indicates that the speeds observed on a road are consistent. If it is not close to the average speed, this means that a significant proportion of drivers are above the average recorded speed.
Note: Wiltshire Police use 85th Percentile speeds to determine whether they should conduct their own Speed Checks in any location. This is normally determined by the use of a Traffic Speed Survey which is sometimes referred to as a Metro Count. It involves two rubber strips placed across the road connected to a recording device. To-date, the Parish Council have had to request Speed Traffic Survey reports on a case by case basis, before any Police enforcement action will be considered.
coombe_bissett_and_homington_sid_location_-_website.pdf |