Inner London 20mph project

David Rogers made this Freedom of Information request to Transport for London

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Dear Transport for London,

You recently implemented a change from 30mph to 20mph on all TFL roads in inner London.

https://tfl.gov.uk/corporate/safety-and-...

What was the full cost of this scheme?

Your website talks about collisions. Please release the collision data on the affected corridors before implementation.

Your website says "We'll continue to monitor the effectiveness of these measures in lowering speeds, so we can determine if more design changes are needed"
Please release the data you are using for this.

How will you be measuring the success of the scheme?

What budget do you have for the second phase?

Yours faithfully,

David Rogers

FOI, Transport for London

Dear Mr Rogers

 

TfL Ref 1699-2021

 

Thank you for your request received by Transport for London (TfL) on25
November 2020 asking for information about the London 20mph project.

 

Please think carefully about whether the request is essential at this
current time, as answering FOI requests will require the use of limited
resources and the attention of staff who could be supporting other
essential activity. Where requests are made, please note that our response
time may be impacted by the current situation and so you may wish to
reconsider the timing of this request. Please notify us as soon as
possible if you would like to withdraw your request at the current time.

 

Should you wish to proceed with the request we will aim to issue a
response by 24 December 2020.

 

We publish a substantial range of information on our website on subjects
including operational performance, contracts, expenditure, journey data,
governance and our financial performance. This includes data which is
frequently asked for in FOI requests or other public queries. Please check
[1]http://www.tfl.gov.uk/corporate/transpar... to see if this helps you.

 

We will publish anonymised versions of requests and responses on the
[2]www.tfl.gov.uk website. We will not publish your name and we will send
a copy of the response to you before it is published on our website.

 

In the meantime, if you would like to discuss this matter further, please
do not hesitate to contact me.

 

Yours sincerely

 

 

Sara Thomas

FOI Case Management Team

General Counsel

Transport for London

 

 

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FOI, Transport for London

1 Attachment

 

Dear Mr Rogers

 

TfL Ref 1699-2021

 

Thank you for your request received by Transport for London (TfL) on 25
November 2020 asking for information about the London 20mph project.

 

Your request has been considered in accordance with the requirements of
the Freedom of Information Act and our information access policy.  I can
confirm that we hold some of the the information you require. Your request
and the information you asked for is as follows:

 

You recently implemented a change from 30mph to 20mph on all TFL roads in
inner London:
[1]https://tfl.gov.uk/corporate/safety-and-...

 

What was the full cost of this scheme?

o The outturn cost of the project to convert TfL roads to 20mph
operation inside the congestion charging zone was £2.5m.

 

Your website talks about collisions. Please release the collision data on
the affected corridors before implementation.

o Please see below the 36 months of collision data collected to December
2017. This data represents the pre-implementation data that we
collected for the proposals and used to develop the business case. It
 covers the period January 2015 to December 2017.

 

 

Name Description Months Total Fatal Serious Slight
20INNER_CORRIDOR_01 Millbank 36 24 0 4 20
A3036 Albert 36 35 0 1 34
20INNER_CORRIDOR_02 Embankment
A3211 Victoria 36 138 2 22 114
20INNER_CORRIDOR_03 Embankment
A3211 Upper Thames 36 42 0 6 36
20INNER_CORRIDOR_04 Street
A3211 Lower Thames 36 67 0 11 56
20INNER_CORRIDOR_05 Street & Tower Hill
20INNER_CORRIDOR_06 Aldgate 36 131 1 21 109
20INNER_CORRIDOR_07 Great Dover Street 36 41 0 3 38
20INNER_CORRIDOR_08 Borough High Street 36 68 0 5 24
Tooley Street /
Crucifix Lane / 36 61 0 7 54
20INNER_CORRIDOR_09 Druid Street
20INNER_CORRIDOR_10 Blackfriars Road 36 48 0 6 42
20INNER_CORRIDOR_11 Lambeth Bridge 36 108 2 10 96
Totals 763 5 96 623

 

Your website says "We'll continue to monitor the effectiveness of these
measures in lowering speeds, so we can determine if more design changes
are needed"

Please release the data you are using for this.

 

o We will be monitoring 36 months of collision data by monitoring the
number of collisions that take place and the number of each severity
as split down by each of the categories the data is presented in:
fatal, serious and slight. We would normally monitor data for the
immediate 36 months following implementation, so April 2020 to March
2023, however, we will need to consider whether data collected during
the coronavirus pandemic period is a fair comparison. We therefore do
not hold this data at this time.

 

From 2 March 2020, the roads we operate and manage within the central
London Congestion Charging Zone had a new speed limit of 20mph. Collision
data from around the world is very clear. It shows that the faster a
vehicle is travelling:

 

The more likely a collision will occur because the driver has less time to
react, stop or avoid the collision

The more severe an injury resulting from the collision will be

 

For example, if you hit someone at 30mph they're five times more likely to
die than if you hit them at 20mph. That's why this new limit is so
important and why we ask for drivers to watch their speed as they’re
driving through central London.

 

The Metropolitan Police enforce all speed limits in London. They do this
using on-street officers, mobile speed cameras and fixed speed cameras. In
2018, 154,785 people were caught and penalised for speeding related
offences, including 38,878 on 20mph limit roads.

 

The Metropolitan Police will continue enforcing all speed limits across
London, including where new speed limits are in place.

 

There are many different ways to encourage people to drive at lower
speeds, but evidence shows that self-enforcing speed limits are the most
successful way to reduce speeds.

 

A self-enforcing speed limit means that people are more likely to drive
within the signed speed limit because they feel it's the easiest and
safest speed to drive along that road. This is generally because of the
way the road looks and has been designed.

 

Some of the design and engineering measures used to lower speeds are:

 

 

+ Signs
+ Road markings
+ Speed cushions
+ Speed bumps
+ Raising pedestrian crossings
+ Widening footways for people walking
+ Giving more space to people cycling
+ Removing the white line in the centre of a road
+ Changing the surface of the road
+ Creating curves along the road that requires vehicles travelling in
different directions have to slow down or give way
+ Introducing more traffic islands in the centre of the road
+ Placing trees, planters and parklets along the roadside or in the
centre of the road

 

There's no 'one size fits all' approach to reducing vehicle speeds. We use
different measures depending on the type of road, who uses the road and
the road space available.

 

We'll continue to monitor the effectiveness of these measures in lowering
speeds.

 

How will you be measuring the success of the scheme?

 

o We will be considering the change in speeds recorded on our network
and the change in fatal and serious collisions that occur. Changes on
our network during 2020 may be due to the worldwide Coronavirus
pandemic, and analysis will be undertaken to identify where this is
the case.

 

 

What budget do you have for the second phase?

 

o We currently have £1.5m funding approved in 2020/21 to commence design
work on phase 2 of the project.

 

 

 

If you are considering submitting a further FOI request please think
carefully about whether the request is essential at this current time, as
answering FOI requests will require the use of limited resources and the
attention of staff who could be supporting other essential activity. Where
requests are made, please note that our response time may be impacted by
the current situation.

 

 

If this is not the information you are looking for, or if you are unable
to access it for any reason, please do not hesitate to contact me.

 

Please see the attached information sheet for details of your right to
appeal as well as information on copyright and what to do if you would
like to re-use any of the information we have disclosed.

 

Yours sincerely

 

 

Sara Thomas

FOI Case Management Team

General Counsel

Transport for London

 

 

 

From: FOI
Sent: 26 November 2020 12:46
To: 'David Rogers' <[2][FOI #708650 email]>
Subject: RE: Freedom of Information request - Inner London 20mph project
foi ref 1699-2021

 

Dear Mr Rogers

 

TfL Ref 1699-2021

 

Thank you for your request received by Transport for London (TfL) on25
November 2020 asking for information about the London 20mph project.

 

Please think carefully about whether the request is essential at this
current time, as answering FOI requests will require the use of limited
resources and the attention of staff who could be supporting other
essential activity. Where requests are made, please note that our response
time may be impacted by the current situation and so you may wish to
reconsider the timing of this request. Please notify us as soon as
possible if you would like to withdraw your request at the current time.

 

Should you wish to proceed with the request we will aim to issue a
response by 24 December 2020.

 

We publish a substantial range of information on our website on subjects
including operational performance, contracts, expenditure, journey data,
governance and our financial performance. This includes data which is
frequently asked for in FOI requests or other public queries. Please check
[3]http://www.tfl.gov.uk/corporate/transpar... to see if this helps you.

 

We will publish anonymised versions of requests and responses on the
[4]www.tfl.gov.uk website. We will not publish your name and we will send
a copy of the response to you before it is published on our website.

 

In the meantime, if you would like to discuss this matter further, please
do not hesitate to contact me.

 

Yours sincerely

 

 

Sara Thomas

FOI Case Management Team

General Counsel

Transport for London

 

 

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Dear FOI,

Thank you for this. Please can you supply the speed data for the sites for pre implementation and any speed data you have for after implementation

Yours sincerely,

David Rogers

FOI, Transport for London

Dear David Rogers

 

Our ref: FOI-1943-2021/GH

 

Thank you for your request received by Transport for London (TfL) on 24
December 2020 asking for speed data.

 

Please think carefully about whether the request is essential at this
current time, as answering FOI requests will require the use of limited
resources and the attention of staff who could be supporting other
essential activity. Where requests are made, please note that our response
time may be impacted by the current situation and so you may wish to
reconsider the timing of this request. Please notify us as soon as
possible if you would like to withdraw your request at the current time.

 

Should you wish to proceed with the request we will aim to issue a
response by 27 January 2021 in accordance with the Freedom of Information
Act 2000 and our information access policy. We publish a substantial
range of information on our website on subjects including operational
performance, contracts, expenditure, journey data, governance and our
financial performance. This includes data which is frequently asked for in
FOI requests or other public queries. Please check
[1]http://www.tfl.gov.uk/corporate/transpar... to see if this helps you.

 

We will publish anonymised versions of requests and responses on the
[2]www.tfl.gov.uk website. We will not publish your name and we will send
a copy of the response to you before it is published on our website.

 

In the meantime, if you would like to discuss this matter further, please
do not hesitate to contact me.

 

Yours sincerely

 

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

 

 

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References

Visible links
1. http://www.tfl.gov.uk/corporate/transpar...
2. http://www.tfl.gov.uk/
3. http://www.tfl.gov.uk/corporate/about-tfl/

FOI, Transport for London

2 Attachments

Dear David Rogers

 

Our ref: FOI-1943-2021/GH

 

Thank you for your request received by Transport for London (TfL) on 24
December 2020 asking for speed data.

 

Your request has been considered under the requirements of the Freedom of
Information Act 2000 and our information access policy. I can confirm that
we do hold the information you require.

 

Please find attached the speed survey data that was collected in advance
of implementation of the 20mph speed limit on the TfL road network in
Central London in March 2020. We collected data in three different months
and they are all displayed on the same map. The map includes the 24 hour
and 7pm-7am mean speed at each location.

 

Post-implementation data was scheduled to be collected in the same months
in the subsequent year (June 2020, October 2020 and January 2021). This
has not taken place due to the Coronavirus pandemic. We do intend to
commission further speed surveys to measure the impact of the project,
once traffic levels are not so different in Central London due to the
pandemic.

 

If this is not the information you are looking for, or if you are unable
to access it for some reason, please do not hesitate to contact me.

 

If you are considering submitting a further FOI request please think
carefully about whether the request is essential at this current time, as
answering FOI requests will require the use of limited resources and the
attention of staff who could be supporting other essential activity. Where
requests are made, please note that our response time may be impacted by
the current situation.

 

If you are not satisfied with this response please see the attached
information sheet for details of your right to appeal.

 

Yours sincerely

 

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

 

 

show quoted sections

 

References

Visible links
1. http://www.tfl.gov.uk/corporate/about-tfl/