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

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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

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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

Questions?

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