Changes in TfL Cycle Designs
Korak van Tuyl
Jack Pulker
October 2015
Background – Cycle Superhighway
• Introduced 2010
Background – Cycle Superhighway
• Predominantly on carriageway facilities
• Extensive use of Blue Paint
Background – Cycle Superhighway
• Some junction redesign
• Mainly removing Left Turn Slip Lanes
Cambridge Heath
Background – Better Junctions
• Cycle Fatalities on/near CSH
• Political Criticism of designs
Junctions Review Programme
• Started in late 2011
• 100 junctions looked at “in depth”
• 33 junctions progressed under “Better
Junctions Banner”
• Off-Street TRL Trials set-up Dec’12
Changes in Design
Better
Junctions
TRL Trials
On Street
Trials
Changes in
TSRGD
New CSH
routes
CSH
Upgrades
Continental
Practises
International
Benchmarking
Learning from Others
International Study
• Trip to Paris – March 2013
• Trip to Copenhagen – April 2013
• Trip to Holland – May 2013
International Bench Marking
• Visits to 14 cities during Summer 2013
• Report published by Urban Movement for TfL – Dec
2014
• https://www.tfl.gov.uk/cdn/static/cms/documents/internati
onal-cycling-infrastructure-best-practice-study.pdf
International Bench Marking
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Common Techniques - Links
L1 - Fit-for-purpose cycle lanes/paths/tracks
L2 - Separating cycles & motor traffic
L3 - Cycleways away from motor traffic
L4 - Bi-directional cycle lanes/track
L5 - Interaction of lanes/tracks with side streets
L6 - Addressing pinch-points
International Bench Marking
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Common Techniques - Junctions
J1 - Advanced stop-lines
J2 - Cycle-specific signals
J3 - Two-stage opposed turns
J4 - Measures to minimise ‘left hook’
J5 - Cycle exemptions at red signals
J6 - Simultaneous greens for cycles
J7 - Cycle-friendly roundabouts
J8 - Parallel pedestrian & cycle crossings
TRL Trials
“Cycle Facility Trials”
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Started December 2012 - completed Oct 2013
6 Physical Trials constructed
2 desk-top studies
1 Cycle Simulator build
http://www.trl.co.uk/solutions/sustainability/cycling/safercycling-innovations/
• Additional off-street trial - Mar ‘14 – Jul ’14
• On Street Trials
Segregation methods
Set back of
segregation
Road
Markings
Types of segregation
Segregation Outcomes
• Set Back Distance – either less than 5m,
or greater than 20m
• Existing Road Marking styles are best
understood by road users
• Segregation Method
– Use depends on location and environment
– Not a “road marking“
– Not in TSRGD nor require authorisation
Oval – Fly Through
Kennington Oval
Kennington Oval
Kennington Oval
Oval – Stepped Track
• Oval cycle-through fade at signals.mp4
Wands - Segregation
Kerbed Segregation and Wands
• Segregation and wands.MP4
Bus Stop Bypass
Capacity of island
Pedestrian / Cycle
interactions
Bus Stop bypasses - Capacity
• Theoretical capacity = 80 pedestrians
• Actual capacity = 68 pedestrian (or 85%)
• “Formal Queuing” stopped between 33-47
pedestrians
Bus Stops
Loading Bays
Bus Stop Bypass video
• Bus Stop Bypass CS2.MP4
Two Way Cycle Tracks
• Victoria Embankment
• CS3 – Cable Street
Two Way Cycle Tracks
• East west.MP4
Red cycle Aspects
• Understanding and
Compliance as “Full Red”
• Stepping stone for LLCS
• Installed at 13
Locations in
London
Low Level Cycle Signals
LLCS usages
On its own
Repeater
Early Start
JUNCTION DESIGN
Green Time for Cyclists
relative to the demand
2 stage right turn
Cycle specific
signals at Low level
Mitigate Left Hook
Segregated cycle lane
Hold the Left
Kennington Oval
CS2 – Cambridge Heath
Hold the Left
• Hold The left.AVI
Queens Circus Before
Queens Circus After
Signal layouts
Progression
• QC north to south.MP4
Early Release
Cambridge Heath Road – 4 seconds early release for
cyclists
Early Release video - TRL
• 4 second early start - repeater.MTS
Estimated Benefits
1st Cyclist with no
early release
(20m distance)
Car entering
junction
1st Cyclist with 4
seconds early release
(38m distance)
Early Release findings
• All the car drivers and about 95% of cyclists and
motorcyclists said they noticed the early release.
• Over 80% were positive about the early release
• About 75% of cyclists and about 50% of car drivers did
not notice the difference between the shorter and longer
early releases
• About a 50% of cyclists, 33% of motorcyclists and 20%
of drivers said they would be more likely to cycle in busy
traffic if more junctions were like this.
On Site – Cambridge Heath
• CH early release.MP4
2 Stage Right Turn
A
D
B
Storage
area or
‘box’
Adjacent approach
C
Single-stage ‘normal’ right turn path
Two-stage right turn path
Cambridge Heath
2 stage right turn video
• ASL - CAmbridge Heath.MP4
DESIGN PHILOSOPHY
• Separation in time and space
– At junctions
– On Links
• Minimise conflicting movements
• Benefits to cyclists
– green time
– Progression through networks
• Provision for all abilities
Old Street
Elephant & Castle
Stockwell
St George’s Circus (North South)
Parliament Sq (East – West)
Questions?
Jack Pulker
Jack.Pulker@tfl.gov.uk
Korak van Tuyl
Kornelis.vantuyl@tfl.gov.uk