Chris Oakley, Director, Transport Planning & Strategy, Crowd Dynamics: Beyond the low-hanging fruit
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Transcript of Chris Oakley, Director, Transport Planning & Strategy, Crowd Dynamics: Beyond the low-hanging fruit
Beyond the low hanging fruit !
Chris Oakley
www.crowddynamics.com
Wide Spectrum of streets and junctions
2
Whats the problem ?
• Many streets will remain heavily trafficked
• Can these be enhanced to
- Reduce emissions
- Improve priority for pedestrians, cycles and buses
- Improve safety
- Improve their attractiveness/vitality
• Whilst maintaining traffic capacity
Evolution of design process
• Shared Space - lightly trafficked streets
- moderately trafficked streets
- Schwarzenburgstrasse Berne
- Ashford
- Poynton Phase 1
Evolution of design process
Poynton Phase 2 –
Shared Space Heavily trafficked
6
Poynton Phase 2 –
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Evolution of design proces
Alternatives to Traffic Signals
- Switch Off
9
Traffic Signal Switch Off
10
Analysis – Fountains Place Junction
Traffic Signal Switch off – Queue lengths
Traffic Signal Switch Off- Analysis
12
UAF Simulation
Example junction5 : Ruthin road/ Bradley Road
Wrexham
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Alternative junction configurations
Comparison of alternatives
• Pedestrian Amenity
• Pedestrian Delay
• Traffic Delay and junction Capacity
• Emissions
• Impact on bus operations
• Impact on Cyclists
• Safety.
• Cost
Alternative junction configurations
•Option 1 - Traffic signals with pedestrian stage
•Option 2 - Mini Roundabout with puffin crossings on all arms
•Option 3 - Traffic signals with pedestrian stage + scatter crossings
•Option 4 – Mini Roundabout with zebra crossings on all arms (a) At 5m distance from roundabout(b) At 10m (c) At 20m
•Option 5 – Shared Space concept
Alternative junction configurations
Roundabout with zebras 5m back from stop lines Roundabout with zebras /puffins 20m back from
stop lines
Signals option with conventional
pedestrian crossings
Shared space
Signals option with no
pedestrian crossings
Signals option with ‘all ways’
pedestrian crossings
Alternative junction configurations
Comparison of alternatives- Quantification
• Pedestrian Amenity
• Pedestrian Delay
• Traffic Delay and junction Capacity
• Emissions
• Impact on bus operations
• Impact on Cyclists
• Safety.
• Cost
Pedestrian and traffic simulation
UAF
Pedestrian/Traffic Interaction at Junction
19 UAF
Alternative junction configurations
Pedestrian Travel time Analysis
Alternative junction configurations
Emissions Analysis
Comparison of Options
Amenity Delay Overall
Option 4 Option 5Option 4/5
Option 5 Option 4Existing
Option 3 Option2 Option 2
Option 1 Option 3Option 1 Existing
ExistingOption 2 Option 1/3
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Ranking of Options in terms of Pedestrian priority
Overall
Existing
Option 4
Option 2
Option 5
Option 1
Option 3
Ranking of Options in terms of Traffic Efficiency
Comparison of options - Safety
Site Review
Pedestrian
Research
& Statistics
Overall
Traffic signals
Traffic SignalsMini Roundabout with
puffinsTraffic Signals
Mini Roundabout with zebras
Signals with scatter crossings
Mini roundabout with zebra or puffins
Mini Roundabout with zebras
Signals with scatter crossings
Traffic Signals with Scatter crossings
Existing Existing Existing
Mini Roundabout with Puffins
Shared Space Shared Space
Option 5
Ranking of options in terms of safety
Ruthin Road – Bradley Road
Recent Junction Improvement
� Photios
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Alternative Junction Configurations-
Initial findings
• Shared Space – Heavily trafficked
– Await opening at Poynton with considerable interest
Alternative Junction Configurations-
Initial findings
• Shared Space - Heavily trafficked
- Await opening with considerable interest
• Traffic signal switch offs
- Can significantly reduce delay.
- Issue of pedestrian amenity , but not delay
Alternative Junction Configurations-
Initial findings
• Shared Space - Heavily trafficked
- Await opening with considerable interest
• Traffic signal switch offs
- Can significantly reduce delay.
- Issue of pedestrian amenity , but not delay
• Alternatives to signals –
-Typically more efficient in terms of traffic movement
-Reduce emissions.
-Pedestrian delay typically reduced.
-Safety ?
Conclusions
• Innovative and efficient design solutions are deliverable
•Doesn’t have to be shared space, Cheaper more conventional solutions
possible.
• Emissions can be reduced
• Comparative analysis of wide range options now possible
• Modelling has vital role in refining/optimising schemes
• Need further study and demonstration projects
Finally
• Reappraise our approach to street and junction design
• Never a perfect design
• Always requires compromise from the different users of the street