a) How many road traffic collisions have there been at the junction? Of those - How many involved motorcycles? How many resulted in injury? How many resulted in fatality? b) How many faults/defects have there been with the traffic lights? What were the nature of the faults/defects? When were these faults/defects? c) On how many occasions have the timings of the traffic light sequences been changed? What were the changes? When were these changes? d) Where are the TFL operated CCTV cameras located in the vicinity of the junction? When were these cameras installed/operational?

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TfL Ref: FOI-2527-1920

Thank you for your request received by Transport for London (TfL) on 19 November 2019 asking for information about the junction at Cheyne Walk (A3220/A3212) / Battersea Bridge Road (A3220) / Beaufort Street over the last 10 years.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our Information Access Policy. You asked:

a) How many road traffic collisions have there been at the junction? Of those - How many involved motorcycles? How many resulted in injury? How many resulted in fatality?

The London Collision map holds personal injury collision data for the London area from 2005 – 2018 which is the latest finalised data available. https://tfl.gov.uk/corporate/safety-and-security/road-safety/london-collision-map

In accordance with section 21 of the FOI Act, we are not obliged to supply you with a copy of the requested information as it is already accessible to you elsewhere.

b) How many faults/defects have there been with the traffic lights? What were the nature of the faults/defects? When were these faults/defects?

Please find attached our report which includes all faults/defects for Cheyne Walk (A3220/A3212) / Battersea Bridge Road (A3220) / Beaufort Street site ID no:12/003 over the past ten years. 

The table below outlines the ten most common types of faults/defects:

Nature of Faults/defects	Count of Fault Description
ASPECT OUT	69
ALARM 05: DATA TRANSMISSION FAULT - NO RETURN DATA	37
ALARM 06: 30 DATA TRANSMISSION ERRORS IN 1 HOUR	24
BOX SIGN OUT	14
ALARM 14: ALL OUT FOR MORE THAN 120 SECONDS	10
SDFH REPORTED SCOOT DETECTOR FAULT - DETAILS IN TEXT	8
SWITCH OUT SIGNALS AS TEXT (RECHARGEABLE)	7
NOTIFICATION OF COMMISSIONING	6
SWITCH OUT SIGNALS AS TEXT (NON - RECHARGEABLE)	5
SECRET SIGN OUT	4
MAINTENANCE CONTRACTOR INVITED TO WITNESS COMMISSIONING	4
Total	188

c) On how many occasions have the timings of the traffic light sequences been changed? What were the changes? When were these changes?

The traffic signals at this junction are controlled by our dynamic traffic control system, which uses detectors buried in the road surface to measure traffic flow on each approach and then adjusts the amount of green time given. This means that the timings can be constantly changing and optimising to live traffic conditions to balance the needs of all customers. The signal timings can also be manually adjusted by operators working in our Network Management Control Centre when responding to incidents such as collisions or roadworks. As such, it is not possible to quantify how many and when these small changes were made.

We regularly carry out an in-depth review of the traffic control system to ensure it is working as effectively as possible and is correctly balancing the needs of all road users. We last carried out one of these timing reviews in July 2018, where we sought to increase the amount of green time to the north and south movements over Battersea Bridge. Previously, this junction was also reviewed in 2013, whereby the maximum amount of available green time was increased for all approaches.

d) Where are the TFL operated CCTV cameras located in the vicinity of the junction? When were these cameras installed/operational?

One of TfL’s CCTV cameras is situated at the site of the foot of Battersea Bridge on the south east corner at the north side of the bridge.  From our records we believe that the original site was installed in 1995. 

The nearest cameras to this site are located at the following locations:

Chelsea Embankment – Albert Bridge – Oakley Street

Albert Bridge Road Southside by Anhalt road

Tadema Road by Kings Road

Battersea Bridge Road by Westbridge Road

Battersea Bridge Road – Ethelburga Street

Chelsea Embankment by Royal Hospital Road

Fulham Road by Redcliffe Gardens

These cameras are marked on the map below:

Please see the attached information sheet for details of your right to appeal.

Yours sincerely,

Melissa Nichols

FOI Case Officer

General Counsel

Transport for London

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