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Sound TransitApril 27, 2018 RPEC Presentation
South Sounder Capacity Expansion
South Sounder Capacity Expansion
Project Description
• Extend station platforms to allow 10-
car trains (currently Sounder has 7-car
trains)
• Track and signal improvements to
increase rail capacity - needed for
extension to Dupont & JBLM and
potentially additional trips
• Nonmotorized and Bus safety and
access improvements around stations
• Project was approved in ST3
Sounder South Line connects or serves 8
regional growth centers and 4 MIC centers
26 Sounder trains serve the Seattle-
Lakewood corridor daily
Trains operate every 20 minutes in the peak
periods
The span of service is 4:36 a.m. to 7:46 p.m.
Peak trains have capacity constraints / people
standing.
Sounder Ridership Growth
The Sounder South line averaged nearly 16,000
weekday boardings in 2017 – a 5.5% increase
over 2016 ridership levels.
Projected Average Weekday Boardings
• 2017 = 16,000
• 2032 = 25,600
• 2042 = 28,200 – 35,900
Longer, 10-car trains are needed to accommodate
current demand and projected growth. 10-car
trains allows 10,374 additional riders per weekday
Track and Signal Improvements Include
• Additional Main Line Track
• Turnouts
• Gated Signals
• Track improvements along sections
of corridor
Nonmotorized & Bus Access and Safety Improvements
• Pedestrian access
• Within ¼ mile of station
• Paths
• Ped Bridges
• Signage
• Bicycle access
• Within ½ mile of station
• Bike lockers
• Bike Paths
• Signage
• Bus access
• Expanded pickup/dropoff
• Additional bus/transfer
facilities
Going from 7-car trains to 10-car trains allows 10,374
additional riders per weekday (2.7 million annually)
Additional ridership expected to reduce 66.6 million VMT
annually
Taking Sounder instead of driving can save an average of
27 minutes per trip or 54 minutes per day.
Track and signal improvements benefit both passenger and
freight rail (40+ freight trains use the same corridor)
Station area nonmotorized and bus improvements improve
access and safety
Project Benefits
Demographics
Of the 9 South Sounder station areas:
Populations in Poverty – 7 stations areas are higher than the region-wide rate of 11%
• 12.4% of Sound Transit District’s population is classified as low-income
• About 9% of all households do not have access to a car.
Minority Populations – 5 stations areas greater than the regional average of 33.6%
Disabled Populations – All stations similar to or higher than the region-wide rate of 11%
Highly Impacted Communities – 4 stations are located in highly impacted communities with
degraded air quality.
Access to Opportunities – 7 stations have Very Low or Low Opportunity.
Access to Jobs & Supportive of CTR
• Connects multiple 12 regional growth centers/MICs with
populations totaling 78,300 and 299,502 jobs in Pierce and
King counties.
• 54% of Sounder riders use an ORCA card provided by
their employer.
• 60% of those Sounder boardings are from large regional
employers such as:
Amazon, Weyerhaeuser, Group Health Cooperative, Swedish
Health Services, Microsoft, Providence Health and Services,
Frank Russell Company, Virginia Mason, Seattle Children’s,
Zillow, MultiCare Health System, SMG and Zulily.
Supportive of the Region’s Economic Strategy to “Improve the links between housing and
employment centers by delivering reliable transit connections that cut current commute times.”
Air Quality & Health Benefits
Reduces 66.6 million VMT annually from the I-5 and
SR 167 corridors
Reduces 49.7 tons of CO, 2.7 tons of NOx, 17,840 tons
of CO2, 0.103 tons of PM10 and 0.095 tons of PM2.5
The estimated annual health/financial benefit is
$68,998 to $155,472
Long term benefits: assets have 30+ year useful life
Source: Puget Sound Clean Air Agency COBRA Model
Request: $6.7m of regional CMAQ
($5.6m for Design and $1.1m for ROW)
ST local funds available for match
NEPA CE or Documented CE
Funds can be obligated immediately and the Design
and ROW phases complete by the end of 2022.
Planning - 2018-2020
PE/Design – 2021
ROW – 2022
Construction – 2023-2027
Open for service 2027
Funding Request & Project Readiness
Questions?