RT HON DR Andrew Murrison MP Coming to Bratton

15 Jul 2021

Road Saftey

20 Feb 2021

HIGHWAYS & TRANSPORT TRAFFIC & NETWORK MANAGEMENT BRATTON VILLAGE 20mph Speed Restriction Assessment Document Control...

Volunteer to Help

17 Mar 2020

 All households will be affected by the Corona virus crisis.  You can help your local community by volunteering to help where you can. 

Request Help

17 Mar 2020

If you, a friend or neighbour living within the parish requires some help because they are self-isolating or restricting their movements as they are...

EPT - Covid19 Emergency Plan

05 Apr 2020

BRATTON EMERGENCY PLAN Caring Organised Volunteers Informing Delivering BRATTON PARISH COVID-19 SUPPORT PLAN

Walter Rose & Son

06 Apr 2020

Order your Meat, Fruit & Veg with delivery to your door at shop.walterroseandson.co.uk or call 01380 722335

The Duke - Takeaway Menu

20 Mar 2020

The Duke at Bratton have a fantastically priced takeaway meals menu for those self isolating or just being cautious.

Michael Bulling - Independent Dairyman

22 Mar 2020

Get Milk, eggs and much much more delivered to your doorstep. Call Michael on 01225 776494 or 07831 477108

HIGHWAYS & TRANSPORT TRAFFIC & NETWORK MANAGEMENT

BRATTON VILLAGE

20mph Speed Restriction Assessment

Document Control Sheet

Project Title: Report Title: Revision: Status:
Date:
Record of issue

1

Bratton Village
20mph Speed Restriction Assessment Version 1
Final
26th January 2021

Issue

Status

Author

Date

Check

Date

Authorised

Date

Final

KR 26/1/21 GTR

26/1/21 GTR

26/1/21

Bratton Village 20mph Speed Restriction Assessment

2

Document Control Sheet.................................................................................................................. 2 1.0 Introduction and background ................................................................................................ 4 2.0 Data Collection ..................................................................................................................... 5 3.0 Collision Data ....................................................................................................................... 6 4.0 Analysis against Wiltshire Council Policy .............................................................................. 7 5.0 Analysis................................................................................................................................ 8 6.0 Conclusion / Recommendation ............................................................................................. 9 8.0 Appendix A......................................................................................................................... 11 9.0 Appendix B ......................................................................................................................... 12

Bratton Village 20mph Speed Restriction Assessment

3

1.0 Introduction and background

Following the publication of Wiltshire Council’s policy for 20mph speed limits, the authority made a commitment to undertake assessments to determine the feasibility of 20mph speed restrictions where requests are made, supported and funded by Community Area Transport Groups.

Westbury Community Area Transport Group requested that the village of Bratton, with the exception of the B3098, be subject to an assessment to determine the feasibility of a 20mph speed restriction.

This report assesses the feasibility when considered in respect of the guidance contained in the following documents:

  1. i)  “Wiltshire Policy on 20mph Speed Limits and Zones”; and,

  2. ii)  The Department for Transport (DfT) Circular 01/2013 “Setting Local Speed Limits”.

Bratton Village 20mph Speed Restriction Assessment

4

2.0 Data Collection

Average speed and volume of traffic were recorded at locations throughout the village using automatic traffic counters. Portable pneumatic tube counters were installed at the locations shown on the plan extract below and operated from the 4th to 10th December 2020.

The data from each survey location has been used to identify free flow traffic speeds. Table 1 summarises the data with the survey locations shown on the plan in Appendix 1. The full survey data can be made available upon request but has not been included in the report due to the quantity.

Location Number

Location Name

Total Traffic Volume
(7 day annual average daily traffic)

85th %ile Speed (mph)

Mean Average Speed (mph)

1 2 3 4 5 6 7

Lower Road 114 Lower Westbury Road 89

Court Lane 558 Castle Road 118 Tyning Lane 184

Southay 46 Stradbrook 109

25 19 23 17 25 21 29 23 18 15 24 19 20 16

Table 1 – Summary of survey results

Bratton Village 20mph Speed Restriction Assessment

5

3.0 Collision Data

An investigation into the Police Collision Database shows there have been 5 recorded Personal Injury Collisions (PICs) within the village of Bratton, resulting in 6 injuries in the between 2017 and 2020. At the time of writing this report, the most recent collision data available to Wiltshire Council is up to end of January 2020.

Each of these collisions occurred on the B3098 during daylight hours. 2 collisions resulted in serious injury, with one of those casualties being a child pedestrian. The remaining injuries were all categorised as slight.

Speed was not recorded as a contributory factor for any of these collisions.

Bratton Village 20mph Speed Restriction Assessment

6

4.0 Analysis against Wiltshire Council Policy

It is important to remember that all speed limits should be set where it can be expected that overall compliance with the limit can be realistically achieved. There is no expectation that higher speeds can be reduced merely through the provision of signs; it is likely that hard engineering measures would be necessary, such as alteration to the road layout and/or road humps.

There are two different types of 20mph speed restriction – a 20mph Zone and a 20mph Speed Limit.

Wiltshire Council policy has taken into account the experience gained from previous studies into 20mph speed limits and zones, as well as the guidance from DfT Circular 01/2013. The Wiltshire policy identifies options to consider when implementing 20mph zones and limits within the county:

20mph Zones:

20mph zones are defined as areas subject to a 20mph speed restriction which cover a number of roads and is supported by the appropriate traffic order and signs.

Typically there will be traffic calming measures at regular intervals throughout the zone to ensure that speeds remain reasonably consistent in the area. These could include the introduction of road humps and raised junctions, as well as build outs, chicanes and pinch points.

20mph zones to be considered where:

  • Roads are already restricted to a 30mph speed limit

  • A proven history of road user conflict with vulnerable users such as child pedestrians is

    apparent.

  • New residential developments have been introduced.

  • There is an alternative existing route, enabling drivers to avoid the zone.

  • On major streets, there are significant numbers of pedestrian or bicycle journeys that are

    considered to outweigh the disadvantage of longer journeys for motorists. 20mph Speed Limits:

    20mph limits are defined as streets where the speed restriction has been reduced to 20mph but where there are no physical calming measures. Drivers are alerted to the restriction by the use of terminal and repeater signs only.

    20mph Speed Limits to be considered where:

  • Mean before speeds are at or below 24mph (if they are just above this threshold lighter touch engineering measures to reduce speed may be implemented)

  • Roads do not have a strategic function or where motor vehicle movement is not the primary function.

  • On major streets there are significant numbers of pedestrian or bicycle journeys that are considered to outweigh the disadvantage of longer journeys for motorists.

  • In rural areas the location, in addition to the above conditions, meets the definition of a village as set out in Traffic Advisory Leaflet “01/04 – Village Speed Limits”.

Bratton Village 20mph Speed Restriction Assessment

7

5.0 Analysis

The speeds recorded at each of the survey points in the village meet the speed related criteria for a 20mph limit as the mean speeds recorded are below 24mph.

Circular 01/2013 ‘Setting Local Speed Limits’ determines the minimum required length over which any speed limit can be introduced. The desirable minimum length of any speed limit is 600m, with 300m being accepted as an absolute minimum for low speed limits where a route is for local access only. The length of Castle Road from its junction with the B3098 to the existing 30mph terminal point is 225m; less than the 300m required. Vehicles entering the speed limit from the south would also be able to see the 30mph terminals that would be required at the junction with the B3098 as they enter the 20mph limit which is again discouraged by Circular 01/13 as this leads to a reduction in compliance. With these issues taken into consideration, it is recommended that Castle Road remains subject to a 30mph speed limit.

The remaining residential roads leading off the B3098 within the village which were not subject to traffic surveys, such as The Butts, Redlands etc, are unlikely to see vehicle speeds in excess of 20mph due to their layout and as such can be included within the introduction of a 20mph sign only limit.

A number of roads within the study area are in private ownership and do not form part of the adopted highway network. These are:

  • Court Orchard

  • Holme Lane

  • Reeves Piece

  • Millditch

  • Church Lane

  • The Ball

  • Sands Lane

  • Ashton Coombe

  • Blatchs Orchard

  • Gilberts Mead

  • Flowers Mead

    Highway authorities can introduce traffic regulation orders onto private roads with the express permission of the owners of the road. Consequently, it may be possible to include some or all these roads. As this is a community led project, it is recommended that these discussions are led from within the local community. Without permission, these roads cannot be included.

Bratton Village 20mph Speed Restriction Assessment

8

6.0 Conclusion / Recommendation

Based on the foregoing analysis it is recommended that a 20mph limit be implemented throughout the village, except for the B3098, Castle Road and those roads not within the adopted highway network.

An outline plans of the recommendation is set out in Appendix B. This shows the approximate location of the terminal and repeater signing that would be required as part of the 20mph limit.

The introduction of a 20mph speed limit as recommended would require speed limit terminal signs to be positioned at each junction with the B3098, along with 20mph repeater signs at intervals of not more than 200m along each route subject to the 20mph speed limit. The current 30mph speed limit is demarcated by terminal signs at the entrances to the village with repeater signs only in locations where street lighting is not present. An outline plan showing the recommended extent of the limit and the approximate locations of terminal and repeater signs can be found in Appendix B. The parish council should consider whether this level of additional signing is acceptable within the village environment.

In addition to the introduction of the 20mph speed limit, the Parish Council/CATG may wish to consider the introduction of a village gateway surfacing treatment and a white village gate on Trowbridge Road. The cost of this has been included as a separate item in the estimate. A plan outlining the standard village gateway treatment is included in the appendices.

Bratton Village 20mph Speed Restriction Assessment

9

7.0 Cost Estimate

The estimated costs of this scheme are set out in the table below.

Item

Approximate costs

Signing costs
Traffic Regulation Order Costs Total Costs

Village gateway treatment -Trowbridge Road
Temporary Traffic Regulation Order Costs (Road closure likely to be needed for surfacing)
Total Costs

£5,500 £2,000 £7,500

£6,000 £2,000

£8,000

 

Item

   

Approximate costs

 

Bratton Village 20mph Speed Restriction Assessment

10

8.0 Appendix A

Locations of traffic surveys:

Bratton Village 20mph Speed Restriction Assessment

11

 

9.0 Appendix B

Recommendations

Bratton Village 20mph Speed Restriction Assessment

12

 

Bratton Village 20mph Speed Restriction Assessment

13

mainimage1 mainimage2 mainimage3 mainimage4