SPRUCE STM Leeds perspective

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SPRUCE (STM) - Leeds perspective
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SPRUCE Project (1998 2007)

• Government UTMC initiative (UTMC01)
• Developed prototype software 2000 trialled on
  Sheffield trams
• Commissioned Microsense 2002 for new software
• Completion 2007

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SPRUCE project (UTMC01)

• SPRUCE?
• Selective PRiority in the UTMC Environment

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Examples of SPRUCE benefits

• Prototype Sheffield (real trams)
• Prototype Croydon (simulated trams)

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Example 1 Sheffield trams (Manor Top)- original
SPRUCE field trials
Target delay reduction to trams
From City Centre
Overall delay reduction (2
junctions) 36 s to 10 s (-73)
1 km
City Rd
Signalised junction
On-street tram
Manor Top
Tram stop
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Preferred strategy for Manor Top
Late region
Early region
0 secs
0 secs
0 secs
0 secs
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Early Plan
Early region
Priority Sequence
early plan
Plan 1
Plan 1
0 secs
0 secs
0 secs
0 secs
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Late Plan
Late region
Non-priority Sequence
late plan
Plan 1
Plan 1
0 secs
0 secs
0 secs
0 secs
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Example 2 Croydon trams (Wellesley Rd)
Target delay reduction to general traffic
START OF PRI series
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Linked (local tram priority)
Base unlinked (local tram priority
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Linked (local tram priority)
Base unlinked (local tram priority
Linked with full SPRUCE Strategy
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Priority through several nodes
Upstream Decision Point
Late region
Priority Sequence
Plan 2
Plan 1
Priority Sequence
Plan 2
Plan 1
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new SPRUCE (STM) architecture
2. Graphical User Interface (GUI)
3. Off-line Development Tool (plans/rules)
4. Simulator Interface
1. Street Communications Interface
SQL Database Rules, data, configurations
Planned interfaces UTMC Air Quality/Noise
pollution
5. AVL Interface (RTIG data standard)
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new SPRUCE (STM) architecture
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Central Control Architecture
Alpha UTC Computer
STM software
Alpha Beta interface (UTMC01 )
Modems
BT circuits
OTU
Controller
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Leeds SPRUCE Architecture
GUI
STM
Alpha UTC Computer
ODT
Modems
BT circuits
OTU
Controller
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new SPRUCE (STM) architecture
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STM GUI
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GREY off-line (e.g. by timetable)
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YELLOW on-line (checked)
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GREEN on-line (in priority)
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RED off-line (faulty)
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new SPRUCE (STM) architecture
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Logic sheet
Specific algorithms
Plan sheet
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new SPRUCE (STM) architecture
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detectors
STM-SPRUCE software
Signal-control
Essential for strategy development
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new SPRUCE (STM) architecture
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Local Control Architecture
0 secs
low power radio
Controller
Receiver
GPS
ACIS relay card
Request virtual loop
Clear virtual loop
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Central Control Architecture
UTC Centre
Alpha UTC Computer
SPRUCE (STM) software
Alpha Beta interface
ADSL
Modems
Metro AVL system
BT circuits
2-3 secs ?
OTU
High power radio
Controller
Virtual detector
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2 examples (as in demo)

• 2 extremes
• Multi-node
• Single node

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extreme methods of STM control
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Woodpecker junction (Route 4)multi-node
junction

• Buses signalled through 3 (of 5) junctions
• Target- to reduce delay to ftr (future) buses
  (inbound)

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FTR Route 4
Whinmoor
Leeds City Centre
Pudsey
Target delay saving (10 junctions) 5
mins (round-trip)
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FTR through Woodpecker Junction
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Woodpecker - complex junction
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Woodpecker - complex junction
1. Approaches given a green extension
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Woodpecker - complex junction
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Target Results ?

• MODE 1
• extensions to selected FTR buses
• Worse-case example 8916 73s
• Average saving 17s

• MODE 2
• recalls to all other FTR buses
• Average saving 9s

Plan changes at 1 node1
Total saving 26s
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Logic structure
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Logic sheet
Plan sheet
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Normal UTC (FT)
am
Plan 1
Node 1
Plan 1
Node 2
Plan 1
Node 3
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Control by STM
am
Plan 1
Mode 0
Node 1
Plan 1
Node 2
Plan 1
Node 3
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Control by STM
am
Plan 1
Mode 1
Node 1
Plan 1
Node 2
Plan 2
Node 3
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Control by STM
am
Plan 3
Mode 2
Node 1
Plan 3
Node 2
Plan 2
Node 3
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Control by STM
Node no.
RunPlan (00001,1)
Plan no.
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Control by STM
Node 1
IF (Mode 0) (TT 1) THEN RunPlan (00001,1)
IF (Mode 1) (TT 1) THEN RunPlan (00001,1)
IF (Mode 2) (TT 1) THEN RunPlan (00001,3)
IF (Mode 0) (TT 3) THEN RunPlan (00001,21)
IF (Mode 1) (TT 3) THEN RunPlan (00001,21)
IF (Mode 2) (TT 3) THEN RunPlan (00001,23)
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Mode structure - Woodpecker
Mode 1
Mode 0
Mode 2
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Mode structure Robin lane
Mode 1
Mode 0
Mode 2
extend
recall
Mode 3
Recover (compensate)
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Single node Staging Robin lane
1
3
2
4
BUS stage
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What does SPRUCE do?

• SPRUCE (STM) provides opportunity to devise
  high performance priority strategies limited
  only by imagination (and by safety physical
  considerations) not by software restrictions!

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Where does Leeds go from here-

• Completion Consolidation of current priority
• son of Supertram
• Non-priority applications

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What is SPRUCE to Leeds ?

• An essential bus priority tool
• Evolving into Programmable UTC !
• In Leeds its a verb
• Well SPRUCE it, means
• We may not yet know how were going to solve a
  particular traffic problem but we certainly
  know the kit were going to do it with