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SR 710 North StudyAll Communities Convening Meeting No. 2 – July 18, 20, and 23, 2013

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Agenda

Study Processy

Alternatives Update

Environmental Studies Update

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SR 710 North Study Schedule

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Purpose and Need Statement

The purpose of the proposed action is to effectively and efficiently accommodate regional and local north-south travel demands in the study area of the western San Gabriel Valley and east/northeast Los Angeles, including the following considerations:

Improve the efficiency of the existing regional freeway and

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transit networks;

Reduce congestion on local arterials adversely affected due to accommodating regional traffic volumes;

Minimize environmental impacts related to mobile sources

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Study Area Map

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Alternatives Being Studied

1. No Build2. TSM/TDM 3. BRT (with TSM/TDM and bus feeder service) 4. LRT (with TSM/TDM and bus feeder service) 5. Freeway TunnelA – Freeway with TSM/TDM* (dual bore tunnel)

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B – Freeway with TSM/TDM and tolls* (single and dual bore tunnel)

C – Freeway with TSM/TDM and Express Bus through the tunnel* (single and dual bore tunnel)

*With and without trucks studied for each

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Alternatives Design Refinements

Improve mobility and reduce congestion p y g

Optimize performance

Reduce ROW and environmental impacts

Reduce construction costs

Minimize community impacts

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Minimize community impacts

Alternatives Refinement Process

TransportationTransportation

Stakeholders

EnvironmentalEnvironmental

TransportationModeling and

Analysis

TransportationModeling and

Analysis

PreliminaryPreliminary

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EnvironmentalStudies and

Documentation

EnvironmentalStudies and

Documentation

yEngineering

and TechnicalReports

yEngineering

and TechnicalReports

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Alternatives Update

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No Build Alternative

Includes planned improvements p pcontained in the 2012 Southern California Association of Governments (SCAG) Regional Transportation Plan (RTP)

Provides the baseline against which all of the build alternatives are compared

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the build alternatives are compared

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Build Alternatives

All Alternatives– Goal: Improve performance from AA Phase

Meet with cities and stakeholders

Refine alternative to minimize impacts while optimizing performance

Develop preliminary engineering plans

Collect data for technical studies

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Collect data for technical studies

Prepare Draft Project Report (Caltrans) and Draft Preliminary Engineering Report (Metro)

TSM/TDM Alternative

Collected additional traffic data

Conducted field observations

Continue to refine elements of TSM/TDM alternative

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TSM/TDM AlternativeTransit RefinementLocal Street and Intersection Improvements

- 27 intersection improvements27 intersection improvements- 7 local street improvements- Modify Fair Oaks and SR 110 interchange-Extend St. John from Del Mar to California-Valley to Mission connector

ITS ImprovementsActive Transportation

-Expanded peak period bus service

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-Pedestrian and bike facility enhancements to support access to transit facilities-Coordinating with local agencies

San Gabriel Valley Signal Forum Measures

-Signal synchronization-Signal optimization-Transit signal priority

BRT Alternative

Improve speed and reliability, comfort and i f th BRT t k/ i li tconvenience for the BRT trunk/spine alignment

Provide rail-like service

Improve access and connectivity to the regional transit system

Reduce potential effects to on-street parking

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Improve quality of BRT stations

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BRT Alternative

Refinements to peak-period-only bus lanes y

Develop concept for bus feeder service

Develop 3 typical station concepts

Exploring new fare collection technologies for reducing delays at bus stops

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delays at bus stops

BRT Alternative – Multi-Modal Concept

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BRT Alternative includes: BRT trunk line arterial and station improvements, reduced headways, new bus

feeder service and enhanced connecting bus services, active transportation, ITS, local street and intersection

improvements in the TSM/TDM Alternative

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LRT Alternative

Continue preliminary design of structures, including t ltunnel

Develop fire life safety, ventilation, and fault crossing details

Identify feeder service (same for BRT): South to Riverside and Orange County Metrolink lines

East and south through SGV to El Monte Bus Station

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West to North Hollywood using route of LADOT 549

North to JPL using existing Metro and municipal services

El Sol Shuttle to ELAC

Identify potential haul destination for excavated material

LRT Alternative

Continue to develop:

• Aerial structure conceptsAerial structure concepts

• Tunnel design detail

• Power needs for TBM

• Construction staging

Portal now south of Valley

Grade-separated maintenance yard over V ll

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Valley

Shifted approach to Fillmore

Construct median on Mednik w/in ROW for LRT columns

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LRT Alternative – Multi-Modal Concept

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LRT Alternative includes: LRT Main line, new bus feeder service and enhanced connecting bus service, active transportation, ITS, local street and intersection

improvements in the TSM/TDM Alternative

Freeway Tunnel Alternative

Continue to coordinate with fire marshal, CHP, and first responders

Continue to develop tunnel and tunnel system design

Identify potential haul destination for excavated material

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Freeway Tunnel

Continue to develop:W ll b id d i• Walls, bridges, drainage

• Tunnel design detail

• Power needs for TBM

• Construction staging

Developing O&M building and landscaping concepts

Providing turnaround area for

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gCHP enforcement

Verifying if access can be provided to St. John Avenue and Pasadena Avenue

Freeway Tunnel with Express Bus –Multi-Modal Concept

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Freeway Tunnel Alternative with Express Bus includes: new bus feeder service and enhanced connecting bus

service, active transportation, ITS, local street and intersection improvements in the TSM/TDM Alternative

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LRT and Freeway Tunnel Design Considerations

Key factors for tunnel design:y gSoil conditions

Ground water condition

Seismicity

Fault hazard

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Tunnel Boring Machines –LRT and Freeway Tunnels

Pressurized face Tunnel Boring M hi (TBM)Machine (TBM)

Adaptable to variable soil conditions

Pressurized-face operationsControls face stability in soil and

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weak rock

Minimizes loss of ground and surface settlement

Prevents groundwater inflows into tunnel

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LRT Tunnel Configuration

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Freeway Tunnel Configurations

D l BDual Bore(Four lanes northbound

and southbound)

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Single Bore(Two lanes northbound

and southbound)

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Tunnel Systems Consideration

Lightingg g Communications Surveillance Ventilation Air Monitoring Aid Stations

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Aid Stations Emergency Egress/

Refuge Public Address/Radio

Rebroadcast

Ventilation and Fire, Life, and Safety Considerations

Design Considerations for LRT Tunnel: Exhaust and supply fans located at stations are

used for ventilation

An exhaust duct at the platform is designated to extract smoke close to the fire position

Design Considerations for Freeway Tunnel: A t l d ti

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Accounts normal and emergency operations

No intermediate exhaust stacks required

Reduce emissions by air-scrubbing at portal areas

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Environmental Studies Update

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Environmental Study Documentation

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Environmental Study Steps

Prepare draft technical studies p

Caltrans/Metro review of draft studies

Prepare final studies for Caltrans/Metro approval

Approved technical studies used to

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prepare Draft EIR/EIS

Presentation of key findings

Key Technical Efforts Underway

Establishing profiles for each community

Assessing properties for eligibility for the National Register of Historic Places

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Identifying key vantage points for visual simulation

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Key Technical Efforts Underway

Identifying sensitive receptors for evaluation in air quality and noise analyses

Conducting field surveys for biological/wetland

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resources

Next Steps

Evaluate performance of build alternatives using 2012 RTP model

Continue to refine alternatives

Continue with Technical Studies

Continue with Preliminary Engineering

Prepare draft EIR/EIS document

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Prepare draft EIR/EIS document

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SR 710 North Study Schedule

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Thank You

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