toronto: gardiner expressway study paramics 2009 ugm: newark october 5, 2009
TRANSCRIPT
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Toronto: Gardiner Expressway Study
Paramics 2009 UGM: NewarkOctober 5, 2009
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Project Introduction
• Frederick G. Gardiner Expressway– Elevated freeway through downtown Toronto
• Lower Don Lands– Former industrial land redeveloped into
residential and commercial uses• Gardiner is seen as a barrier to the
redeveloped LDL– Investigate solutions
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Project Introduction
• Joint Clients– City of Toronto and Waterfront Toronto– City owns the Gardiner– Waterfront Toronto is charged with revitalisation
of the waterfront• Sensitive Project
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Project Scope and Goals
• $6M Planning and Design Study– Sub to Dillon Consulting– ~$300k Microsimulation budget
• Investigate four design options for treatments east of Jarvis Street– Do Nothing, Ameliorate, Remove, Submerge– Five construction staging models
• Goal is to investigate ways of reconnecting the redeveloped Lower Don Lands to the City
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Microsimulation Model Area
• 5 mi2 (13 km2)• Dense, urban development
SPAD
INA
DUNDAS
WOODBINE
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Methodology
• Create existing conditions– Road selection– Zone system creation– Include transit and pedestrians
• Matrix Estimation• Calibration / Validation• Alternative Testing• Construction Staging
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Existing Conditions
• Most roadways in study area– Arterial and up, some collectors, and few locals
• Coding issues with Lake Shore Boulevard
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Existing Conditions
• Arup Model as a starting point• Approximately double model area
ARUPJACOBS
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Zone System
• Layout zones on paper
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Zone System
• Simple one zone per block with access to all roads
• Simplifies creation and coding
• Makes for very difficult matrix estimation
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Zone System
• One zone per connector on each block face
• Allows maximum control
• Model becomes unwieldy with so many zones
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Existing Conditions
• Transit– Streetcars
• Spadina and Queens Quay – Median-running• Other streets – In mixed traffic
– Buses– Subway
• Not included in our model
• Pedestrians– Taken only from Arup model, no new ped work
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Streetcar Coding
• Spadina and Queens Quay– Median-running
• Median Lane Operation– Paramics limitation that similar
movements must be in adjacent lanes
– This is an issue where the transit vehicle through lane is adjacent to a left-turn lane
– Fortunately, coding the through movement in the transit lane as ‘barred’ works perfectly• Transit vehicle moves with normal
traffic ‘through’ green
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Streetcar Coding
• Remainder of Streetcar network is in mixed traffic– Typically runs in the left-hand
lane of a two-lane per direction facility
• Congestion issues due to frequent stops– Both lanes in the streetcar travel
direction must stop when loading/unloading passengers
– New feature built into Paramics
STOP
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Matrix Estimation
• Counts• Travel Demand Model O/D data• Screenlines
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Matrix Estimation
• Issues– Estimation of congested conditions• Counts at congested locations are less useful• Use counts upstream of issues to help estimate
demand
– Grid network adds to the challenge• Many parallel routes and relatively short blocks
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Calibration / Validation• Counts• Travel Times• Screenlines• Major Queue
Locations– Gardiner and
on/off ramps
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Calibration/Validation
• Issues– Major queues on Gardiner• WB in PM, EB in AM• Replication of WB queue may require network
extension or link speed modification at external station
STUDYAREA
CONGESTIONSOURCE
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Future Alternatives
• Do Nothing• Ameliorate
JARVIS
EASTERN
• Remove (bring to ground)• Submerge
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Construction Staging
• With a preferred alternative selected– Build a series of 5 incremental networks that take
the geometry to the final design– Stages given to us for analysis
• Provide results and recommendations
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Conclusions
• Most challenging work will be: – Matrix Estimation– Calibration / Validation
• Questions or Comments?– Adam Lanigan [email protected]