Couldn’t make it to look at the materials in person?  Here are the highlights.  At the bottom is your chance to give us your feedback on how you think we should proceed.

Project Needs Statement

The SR 410/Traffic Avenue interchange is a key element of the transportation system in east Pierce County.  The overpass is a bottleneck for motorized travel and a gap in the system for nonmotorized travel.  Improvements are needed to

  1. Relieve the BOTTLENECK for freight, transit, and automobile travel.
  2. Complete the MISSING LINK between the non-motorized facilities north and south of the interchange.


Planning and Study will continue from 2016 into the first part of 2017.  Later in 2017, Design & Engineering will begin, lasting to mid-2018. In 2018 and into the beginning of 2019, we will secure construction funding with Construction beginning in 2019.


410-traffic_boards_fundingThe total cost of the project is $18 million.  We have already received $8 million from the State of Washington, Port of Tacoma, Sound Transit, private funding, Freight Mobility Strategic Investment Board and the City of Sumner.  For the remaining $10 million, we will be seeking funding from State Transportation Grants, State Legislative Support, Regional Planning Grant and City of Puyallup.

Interchange Options

OPTION 1410-traffic_interchange-option1Signals + Complete Overpass Replacement  $24.4 Million
Dropped from Consideration Due to High Cost


Signals + New Parallel Overpass East  $17.6 Million
Status: Still Being Considered

Signals + New Parallel Overpass West   $18.0 Million
Status: Dropped from Consideration, Non-Motorized Route Crosses Ramp Traffic, Vertical Clearance with SR 410 is Problematic


410-traffic_interchange-option4Roundabouts + New Single Overpass  $23.4 Million
Status: Dropped from Consideration Due to High Cost


410-traffic_interchange-option5Roundabouts + New Parallel Overpass East  $18.2 Million
Status: Still Being Considered


410-traffic_interchange-option6Roundabouts + Existing Overpass $12.6 Million
Status: Dropped from Consideration, Does Not Relieve Bottleneck, Does Not Complete the Missing Link in Non-Motorized Facilities

Comparison of Options Still Being Considered

TOPIC Option 2: Parallel Bridge
Signals at Intersections
Option 5: Parallel Bridge Roundabouts at Intersections Comments
COMMUTE PERIOD TRAFFIC Relieves bottleneck for all directions of travel during both the AM and PM peak periods. Some directions of travel will have long delays and queuing in both the AM and PM peak periods. Roundabouts often reduce delay and improve traffic flow compared to traffic signals when volumes are balanced and low. At this interchange, traffic volumes are high and unbalanced, so signals may have an advantage during peak commute.
OFF-PEAK TRAFFIC Traffic signals will stop two or more directions of traffic at one time. This results in delay even during low volume time periods. Minimal to no delay during the off-peak periods.
TRUCK TRAFFIC Generally acceptable for large trucks Drivers of large trucks often express opposition to roundabouts
NON-MOTORIZED TRAVEL Non-motorized users generally cross travel lanes comfortably with signals Some non-motorized users feel less comfortable crossing travel lanes at roundabouts
INJURIES Higher likelihood of injury accidents Lower likelihood of injury accidents Severe accidents can occur at signalized intersections when drivers run red lights or misjudge left turns. Roundabouts operate at low speeds and force drivers to pay attention.
OPERATIONAL COST Higher Cost Lower Cost Signals have electronic components which require maintenance and use electricity. A signal can cost $5 – 10K per year to operate and maintain.
CONSTRUCTION COST Slightly Lower Slightly Higher

Choosing an Option

Again, here are the final two options remaining:

Preferred Alternatives

Option 2: Signals + New Parallel Overpass East

Preferred Alternatives

Option 5: Roundabouts + New Parallel Overpass East