dynamic corridor congestion management … timing plan designed for the scenario 3. traffic flows...
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Streets and Freeways Subcommittee Meeting May 19, 2016
Dynamic Corridor Congestion Management (DCCM) Project
Background
• South Bay freeways and highways (like PCH) are heavily congested that affect local streets operations
2
The Integrated Corridor Management (ICM) Approach to Congestion Reduction
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Problem: Surface transportation congestion Traditional approach: Optimization of individual networks (freeway, arterials, transit,
etc. each considered separately)
ICM approach: Integrated corridor-wide operations to optimize entire system (not
just individual networks)
USDOT Integrated Corridor Management Vision
ICM Manages: • Total Corridor
Capacity • All modes and
routes together • Corridor as a
single system
1. Improved corridor throughput
2. Reduced impact of incidents on freeways and arterials
3. Enhanced performance measurement capability
4. Improved information sharing
5. Better informed travelers
6. Opportunity for regional stakeholders to participate in developing a model for automated operations
DCCM Benefits and Opportunities
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DCCM Freeway/Arterial Coordination Example
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Scenario
• Accident blocks several lanes on NB I-110 during morning rush hour
• Drivers exit to Figueroa and Vermont to detour around the incident
Current response
1. Arterial signal system
unaware of increased
arterial demand
2. Fixed/time-of-day signal
timings not set up to
accommodate new
demand
3. Traffic backs up on
arterials, turn pockets,
and freeway off-ramps
DCCM-enabled response
1. Freeway management system
alerts arterial system to
increased demand
2. Signal system automatically
implements agreed-upon
signal timing plan designed for
the scenario
3. Traffic flows efficiently along
parallel arterials around the
incident with minimized
impact to the arterial network
I-110
Ve
rmo
nt
Figu
ero
a
1. Identify a pilot corridor on which to deploy a
DCCM freeway-arterial coordination system
2. Develop a concept of operations to guide
implementation
3. Develop Memorandums of Understanding (MOUs)
among all involved stakeholders
4. Conduct a before/after system evaluation for the
initial pilot project
5. Designing and deploying the Decision Support
System (DSS)
6. Designing and Deploying Arterial Management
System (AMS)
South Bay DCCM Project Status
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Complete
Complete
Complete
Before Study Complete
In Development
In Development
Task 1: Corridor Study
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Seven South Bay corridors evaluated
1. SR-91 (from I-110 to Central Ave)
2A. I-110, from SR 47 to I-405
2B I-110 (from I-405 to Imperial Hwy.)
3. I-105 (from Sepulveda Blvd to Central Ave)
4A. I-405 (from I-710 to I-110)
4B. I-405 (from I-110 to I-105)
4C. I-405 (from I-105 to SR-90)
Task 1: Corridor Study – Evaluation Criteria
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Five categories of evaluation criteria:
1. System demand
2. Physical infrastructure
3. ITS infrastructure
4. Institutional coordination challenges
5. ICM readiness
Dynamic Corridor Congestion Management (DCCM)
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Seven South Bay corridors evaluated Corridor 2B Selected I-110 (I-405 to Imperial Hwy)
Dynamic Corridor Congestion Management (DCCM)
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DCCM approach: Integrated corridor-wide operations to optimize
entire system (not just individual networks)
DCCM Operational Scenarios :
1. Moderate-level incident on freeway (partial lane closure)
2. Major incident on freeway (all lanes closed)
3. Moderate incident on arterial (partial lane closure)
4. Major incident on arterial (all lanes closed)
5. Incident on freeway on-ramp
6. Incident on freeway off-ramp
7. Recurrent congestion conditions
High-Level Architecture
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Arterial Management System In Process
2
Dynamic Corridor Ramp Metering Complete
Decision Support System In Process
Data Hub In Process
Arterial Management System (AMS)
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AMS coordinates: Caltrans traffic signal timings with existing external stakeholder systems, including:
• LACDPW's Information Exchange Network (IEN)
• LADOT’s Adaptive Traffic Control System (ATCS)
Decision Support System (DSS)
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DSS purpose: implement effectively in the South Bay area:
• Freeway ramp meter / arterial traffic signal coordination
• Traffic signal operation coordination with adjacent city/county traffic signal systems
DSS objective: develop an interface to execute the DCCM strategy
by feeding traffic information to a future Decision Support System,
with the purpose of coordinating freeway/arterial traffic
operations for congestion relief as defined in DCCM ConOps.
Who Else is Implementing DCCM Solutions?
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Integrated corridor management systems are rapidly being implemented on major corridors across the country:
Seattle (I-5)
San Diego (I-15)
Oakland (I-80) (I-880)
Portland (I-216)
Minneapolis (I-395)
Denver (I-75)
Dallas (US-75)
Houston (I-10)
San Antonio (I-10)
Montgomery County (I-270)
San Mateo (US-101)
Los Angeles (I-210)
Phoenix (I-10)
Detroit (I-75)
Miami-Dade (I-95)
Southwest Penn.
Milwaukee-Chicago
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