Summary of Speed Indicator Device (SID) and Community Speed Watch (CSW) Activity
For the period 16th June to 20th November 2024
Stratford Tony Road SID Site
SID was at the Stratford Road Site from 16th June to 15th July
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Tottens Farm SID Site
SID was at the Tottens Farm Site from 27th July to 11th September
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SID was positioned at the Blandford Road Secondary site from 17th September to 21st October 2024 and was then moved to the Salisbury Road Secondary site from 25th October until 20th November 2024.
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.
Summary of Driver Behaviour Recorded by our SID
For details of traffic speeds for each SID session and comparisons with earlier data please go to the tab for Stratford Tony Road data.
For details of traffic speeds for each SID session and comparisons with earlier data please go to the tab for Tottens Farm data.
For details of traffic speeds for each SID session and comparisons with earlier data please go to the tab for Blandford Road data.
For details of traffic speeds for each SID session and comparisons with earlier data please go to the tab for Salisbury Road data.
I would like to take this opportunity to thank Carola and Chris Thomas and Jonathan Woolven for all their help and support in changing batteries and moving our SID around its various locations in Coombe Bissett this year. The same applies to Simon Boxall and Chris Humphreys for helping with the SID when it is located in Homington.
I would like to take this opportunity to thank Carola and Chris Thomas and Jonathan Woolven for all their help and support in changing batteries and moving our SID around its various locations in Coombe Bissett this year. The same applies to Simon Boxall and Chris Humphreys for helping with the SID when it is located in Homington.
Detailed PDF reports:
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).
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
SID Data Sharing has been rolled out across Wiltshire for more than a year. There are over 100 SIDs installed in towns and parishes across Wiltshire. Communities who have purchased Evolis, MessageMaker, Pandora Technologies or Westcotec devices are able to share their data with Wiltshire Police who use the information to prioritise the deployment of Wiltshire Police’s Speed Enforcement resources.
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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: |
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Community Speed Watch (CSW) Update
A total of 24 Speed Watch sessions were conducted between 1st July and 29th November 2024
Due to holidays and other commitments of our team members our average number of weekly sessions has sadly reduced from 1.9 per week to 1.1 sessions per week. This compares to 2.2 sessions per week approximately this time last year. In our last period we noted that Homington team members were the most active. During this period, the rescheduling of road surface work on the C Class road running through Tottens Farm and Homington restricted traffic and curtailed CSW activity in October/November. During this period our coverage of the A354 at Deegan House has been the most successful – thanks to Gerald Bundy’s stalwart support and the very welcome return of Michael Wardroper to active duties.
The community should appreciate the efforts of all CSW team members who have given up their own time to remind drivers to drive with due care and attention when passing through Coombe Bissett and Homington. For that we are indebted to Gillian Irving, Gerald Bundy, Michael Wardroper, Gill and Chris Humphreys, Sol Rimer and Simon Boxall for their commitment and support throughout the year! Thank you!
The community should appreciate the efforts of all CSW team members who have given up their own time to remind drivers to drive with due care and attention when passing through Coombe Bissett and Homington. For that we are indebted to Gillian Irving, Gerald Bundy, Michael Wardroper, Gill and Chris Humphreys, Sol Rimer and Simon Boxall for their commitment and support throughout the year! Thank you!
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 [email protected] .
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.
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