strategic priority –........buses, trams & fire +brh presented by ben hallworth
TRANSCRIPT
STRATEGIC PRIORITY – ........BUSES, TRAMS & FIRE
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Presented by Ben Hallworth
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• Focusing on the delivery of strategic priority in networks,
• …where a strategy can target identified elements of delay,
• The main priority tool used is ‘telents’ STM software…
• Presentation order• STM Overview• Supporting Tools• Example 1 – Buses, Leeds• Example 2 – Buses, Pudsey Bus Station• Example 3 – Trams, Edinburgh• Example 4 – Fire Priority Green Wave
OVERVIEW
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• ‘STM’ (Strategic Traffic Management) is a software product developed by ‘telent’
• Originally developed by Leeds CC under the DfT sponsored UTMC01 project ….previously known as ‘SPRUCE’
• Implemented in 5 authorities: Leeds, Sheffield, Calderdale, Bradford and Edinburgh.
• Priority implemented at over 400 junctions.
• Strategies are coded in a high level language and delivered via central UTC – (both Peek & Siemens UTC interfaces)
what does it look like...
STM
+brhSpreadsheet like software
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Isolated nodes
Extensions / Recalls (on VA sites ‘extensions’ achieved using ‘holds’)
Passing of central AVL to MOVA priority sites
Groups of nodes
Specific combinations of extensions & recalls
Repeat priority stage
Cycle time changing (e.g ‘doubling’)
Offsets (with restoration)
Offsets (cumulative)
‘Pick up & drop off’ from VA (then ‘extend’ or ‘recall’ – or ‘hold’ or ‘force’ etc. )
Linking of nearby VA junctions
Advance stage demanding
...commonly used STM strategies
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Isolated nodes
Extensions / Recalls (on VA sites ‘extensions’ achieved using ‘holds’)
Passing of central AVL to MOVA priority sites
Groups of nodes
Specific combinations of extensions & recalls
Repeat priority stage
Cycle time changing (e.g ‘doubling’)
Offsets (with restoration)
Offsets (cumulative)
‘Pick up & drop off’ from VA (then ‘extend’ or ‘recall’ – or ‘hold’ or ‘force’ etc. )
Linking of nearby VA junctions
Advance stage demanding
...commonly used STM strategies
+brhB us J ourney T imes B etween P oints 4160 - 2-1 and 4160 -2- 2 (On Meadow L ane Outbound from S outh of B us L ayby
to E xiting H uns let L ane)
0
50
100
150
200
250
07:30:00 09:30:00 11:30:00 13:30:00 15:30:00 17:30:00T ime of Da y
Jour
ney
Tim
e In
Sec
onds
B efore -10th J anto 18thF eb 2011
After -28th F ebto 9th Mar2011
Journey Time Tool
SUPPORTING TOOLS
+brhEXAMPLE 1 – Buses, Leeds
1
2
3
5
4Buses
targeted to reach here
1 cycle earlier
• Radial with 5 nodes & 2 bus stops
• Target inbound delay
• Outbound less of an issue
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buses take around 220s
or 290s
or even 360s
+brhEXAMPLE 1 - Strategy
1
2
3
6
Bus-gate green
recalled
green extended
Green extended
All timings offset
4
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each band is reduced by almost 50s
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each band is reduced by almost 50s
• Mean benefit 47s (AM peak)
• (Outbound benefit lower ~ 10s)
2
1
Video
EXAMPLE 2 – Pudsey Bus Station
Example of more selective priority - given only low-frequency prestige (FTR) buses.
BS
2
1
Video
EXAMPLE 2 – Pudsey Bus Station
Example of more selective priority - given only low-frequency prestige (FTR) buses.
BS
EXAMPLE 2- video
2
1
Video
EXAMPLE 2 – Pudsey Bus Station
Example of more selective priority - given only low-frequency prestige (FTR) buses.
BS
• 61s mean saving
+brh• Due to go live in summer 2014,• Priority across the City Centre will be provided by STM,• Aim is to provide a high level of priority with minimal disruption to traffic.
Junction
Tram Stop
Princes
Street
..to Airport
Line END
Haymarket
EXAMPLE 3 - EDINBURGH TRAMS
+brh• Tram stops well-spaced – with typically 3-5 junctions between,• Lower frequencies of trams gives longer time-horizons and greater
priority.
Junction
Tram Stop
Princes
Street
..to Airport
Line END
Haymarket
EXAMPLE 3 – SUB NETWORKS
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Junction
Tram Stop
EXAMPLE 3 - SUB NETWORKS• Optimal signal timings within a sub network can be well defined,• The key to this is the ability to predict the arrival time of a tram at
each sub-network.
+brh EXAMPLE 3 - STRATEGY
+brh EXAMPLE 3 - STRATEGY
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..to Airport
Haymarket
EXAMPLE 3 - STRATEGY
+brh EXAMPLE 3 - STRATEGY• STM will make gradual changes to
downstream signal timings
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..to Airport
EXAMPLE 3 - STRATEGY• STM will make gradual changes to
downstream signal timings
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Tram Stop..to
AirportHaymarket
EXAMPLE 3 - STRATEGY• STM will make gradual changes to
downstream signal timings
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Based on research carried out in 2009 the West Yorkshire Fire Service commissioned a pilot ‘green wave’ priority system, which has recently been extended.
EXAMPLE 4 - FIRE GREEN WAVE
Fire StationJunction
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Original Pilot success criteria•Ensure and increase safety levels for the public,•Flush traffic from downstream junctions ahead of the Fire Appliance.
Key differences to Buses/Trams•Fire Appliances are extreme low-frequency vehicles;
• Stage skipping can be considered;• Disruption to other traffic is acceptable
•Fire Appliances do not stop at bus/tram stops. •Fire Appliances do not follow known routes.
EXAMPLE 4 - FIRE GREEN WAVE
+brhEXAMPLE 4 - FIRE GREEN WAVE
Fire StationJunction
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Numerous AVL Triggers are used to constantly monitor the Appliance’s progress and to determine it’s route
Fire Station
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Immediate move/hold priority stage
Fire Station
Recall priority stage
Flush out queuing traffic
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Clear down
Fire Station
Recall / hold priority stage
Hold priority stages
+brhEXAMPLE 4 – STANDING TRAFFIC
+brhEXAMPLE 4 – NEAR MISS !
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Three STM strategic priority examples have been discussed with increasing priority needs;
Bus Priority – targeting of particular delay issues with specific techniques can yield significant benefits.
Tram Priority – a more gradual system designed to achieve minimal tram delay without excessive traffic disruption.
Fire Appliance Priority – ultimate low frequency vehicles allow aggressive strategies to ensure green wave progression.
SUMMARY
END