2024 Comprehensive Transportation Plan Projects

COMP-2: Auburn Way N & 42nd St NE Intersection Improvements

Intersection delays will be reduced through the restriction of left turns from 42nd St NE to Auburn Way N during PM peak hours with signage installed on a new raised median.

Estimated Cost: $100,000

COMP-3: I St Improvements (37th St NE - 45th St NE)

The I St NE Corridor provides access to several neighborhoods and commercial properties. To improve multi-modal safety, and meet city roadway standards, bicycle and pedestrian improvements are proposed between 37th St NE and 45th St NE.

Estimated Cost: $6,700,000

COMP-4: I St NE & 37th St NE Intersection Improvements

Intersection delays will be reduced through the construction of a single-lane roundabout.

Estimated Cost: $2,300,000

COMP-5: I St NE & 30th St NE Intersection Improvements

Intersection delays will be reduced through the construction of a single-lane roundabout.

Estimated Cost: $3,250,000

COMP-6: SE 304th St & 112th Ave SE Intersection Improvements

Intersection delays will be reduced through the construction of a new two-stage left turn lane on SE 304th St that will assist motorists turning from 112th Ave SE. A pedestrian refuge island and flashing beacons will be provided to enhance pedestrian crossing safety.

Estimated Cost: $800,000

COMP-7: SE 304th St & 118th Ave SE Intersection Improvements

Intersection delays will be reduced through the construction of a raised median on SE 304th St that will restrict left turns from 118th Ave.

Estimated Cost: $950,000

COMP-8: SE 304th St & 116th Ave SE Intersection Improvements

Intersection delays will be reduced through the construction of a single-lane roundabout.

Estimated Cost: $3,725,000

COMP-9: Lea Hill Corridor Improvements

This project will reduce intersection delays, improve vehicle and active transportation safety, and support mode shift through the construction of the following improvements that would likely be implemented as two separate phased projects:

• Phase 1 -New single lane roundabout at the intersection of Lea Hill Road and 112th Ave SE and removal of the existing traffic signal at the intersection of Lea Hill Road and 105th Ave SE. A raised media would restrict left turning movements at 105th Ave SE.
• Phase 2 - New multi-use shared path along east side (uphill) and bike lane along west side (downhill) of Lea Hill Road from the new roundabout at 104th Ave SE (previously constructed as a separate project), to the new roundabout at 112th Ave SE (constructed with Phase 1 of this project).

Estimated Cost: $14,675,000

Comp-10: 116th Ave SE & SE 312th St Improvements

This project will reduce intersection delays, address bike and pedestrian LTS deficiencies, and provide overall safety improvements on Lea Hill Road/SE 312th Street from a new roundabout to be constructed with a separate project at the intersection of 112th Ave SE to the intersection of 124th Ave SE. Improvements include a new single lane roundabout at the intersection of 116th Ave SE, a bike lane along the north side of Lea Hill Road/SE 312th Street between 112th Ave SE and 116th Ave SE, and completing gaps in sidewalks and bike lanes on both sides of Lea Hill Road/SE 312th Street between 116th Ave SE and 124th Ave SE

Estimated Cost: $5,600,000

COMP-11: 116th Ave SE & SE 320th St Intersection Improvements

This project will improve vehicle and active transportation safety at the intersection with the construction of a single lane roundabout. This project may be expanded to complete gaps in sidewalks and bike lanes on SE 320th Street.

Estimated Cost: $3,150,000

COMP-12: Pike St NE & 8th St NE Access Management

Intersection delays will be reduced by restricting left turns from both northbound and southbound Pike St NE on to 8th St NE.

Estimated Cost: $50,000

COMP-13: 8th St NE Improvements Project (Auburn Way N - Harvey Rd/M St NE)

Residents from the neighborhoods along 8th Street NE currently must walk or ride along narrow shoulders to get to shopping, social services, recreation, and transit along Auburn Way North and M Street/Harvey Rd. This route is part of the City's designated bike route network (as shown in Map 2 - Bike Network) and is a critical connection to Downtown Auburn and regional transit and bike facilities. This project will improve the roadway to provide comfortable walking and biking facilities that meet or exceed the City's active transportation level of service standards. The project concept currently includes a center turn lane but whether or not the lane is included in the final project design will depend on detailed design considerations, including right of way needs.

Estimated Cost: $8,200,000

COMP-14: 10th St NE Improvements (A St NW - Auburn Way N)

This project will provide bicycle facilities that meet or exceed City LTS Standards and improve vehicle and pedestrian safety measures on 10th Street NE between A Street NW and Auburn Way North. Improvements include addition of bike lanes, a road-diet to convert two lanes in each direction with a center turn lane, removal of stop-control at the intersection of A Street NE, and installation of an enhanced pedestrian crossing. The project provides active transportation facilities that connect housing and commercial areas to frequent transit on Auburn Way North.

Estimated Cost: $2,300,000

COMP-15: 15th St NW & M St NW Access Management

Intersection delays will be reduced by restricting left turns from southbound M St NW to eastbound 15th St NW during peak travel demand periods.

Estimated Cost: $50,000

COMP-16: S 316th St & 56th Ave S Intersection Improvements

Intersection delays will be reduced through the construction of a single-lane roundabout.

Estimated Cost: $3,225,000

COMP-17: S 316th St & 51st Ave S Intersection Improvements

Intersection delays will be reduced through the replacement of the stop controls with the construction of a new traffic signal. This intersection is outside City limits in King County. Coordination with King County will be required to fund and implement this project.

Estimated cost: $2,150,000

COMP-18: S 321st St & 44th Ave S/46th Pl S Intersection Improvements

Intersection delays will be reduced through the construction of a single-lane roundabout. This intersection is outside City limits in King County. Coordination with King County will be required to fund and implement this project. Temporary mitigation measures to address existing LOS deficiency may require a traffic signal or other improvements until permanent project can be funded. Additional analysis is needed to determine if existing and/or future capacity needs can be met by improving the right-of-way east of 46th Place with roadway facilities instead of, or in addition to this roundabout.

Estimated Cost: $3,750,000

COMP-19: A St NW & 3rd St NW Improvements

This project will reduce intersection delays and improve overall vehicle, pedestrian, and bicycle operations through this intersection be re-constructing the south leg of the intersection to be re-aligned such that the split phase operations of the signal can be removed. Modeling indicates that despite this project, the southbound right turn lane queue would have a queue length that exceeds LOS standards. Therefore, additional refinement of this project would be required with, or prior to, implementation.

Estimated Cost: $3,025,000

COMP-20: C St NW & 3rd St NW Intersection Improvements

Intersection delays will be reduced through the addition of a dedicated eastbound left turn lane on 3rd Street NW and modifying the signal operations to allow for protected/permissive left-turns on all approaches.

Estimated Cost: $1,900,000

COMP-21: M St SE By-Pass Rd (M St SE By-Pass Rd & SE Auburn-Black Diamond Rd)

This project will provide a new roadway connection between Auburn Black Diamond Road and M Street SE. The new connection will provide pedestrian, bicycle, and vehicle connectivity that allows by-pass of the at-grade railroad crossing at Black Diamond Road/R Street SE to the grade separated crossing at M Street SE. There are two alternatives for this project that will be considered further with preliminary project design.

Option A: Maintain the connection between Auburn Black Diamond Road and R Street SE and re-align the at-grade railroad crossing.

Estimated Cost (Option A): $17,250,000

Option B: Disconnect R Street SE from Auburn Black Diamond Road to allow closure of the at-grade crossing. This project requires coordination and partnership with the Muckleshoot Indian Tribe (MIT) as the new roadway connection would be mostly on MIT land.

Estimated Cost (Option B): $12,600,000

COMP-22: Auburn Way S, M St SE, 17th St SE Intersection Improvements

Intersection delays will be reduced with several improvements including:

• Add a third eastbound lane on Auburn Way South through the intersection.
• Restrict left turns from eastbound Auburn Way South to northbound M Street SE. Vehicles would utilize 12th Street SE for access to M Street SE from eastbound Auburn Way South.
• Restrict left turns from westbound Auburn Way South on the west intersection leg with curbing/median. Access to businesses on the south side of Auburn Way South would be made via a u-turn at the signalized intersection of 12th Street SE/Auburn Way South.
• Left turns from southbound M Street SE to eastbound Auburn Way South would be allowed from the far west lane, creating three lanes available for this movement.
• Eastbound 17th Street SE to eastbound Auburn Way South would be opened where it is currently blocked.
• Northbound movements from M Street SE to Auburn Way South would be restricted and M Street SE would not provide connectivity between 21st Street SE and Auburn Way South.
• Mark east crossing of Auburn Way South with a new crosswalk.
• Improvements on Auburn Way South will be subject to WSDOT complete streets requirements and will require coordination and approval from WSDOT.

Estimated Cost: $2,300,000

COMP-23: M St SE & 12th St SE Intersection Improvements

This project will reduce intersection delays with a new traffic signal. The project will also construct a separated trail along the east side of M Street SE between 12th Street SE and 8th Street SE to address active transportation level of service requirements.

Estimated Cost: $4,650,000

COMP-24: M St SE & 29th St SE Intersection Improvements

This project will reduce vehicle delays, improve operations and safety, and provide improved access for bikes and pedestrians through the intersection through construction of a single lane roundabout to replace the current all-way stop control.

Estimated Cost: $2,925,000

COMP-25: A St SE Corridor Improvements (37th St SE - White River Bridge)

This project will reduce intersection delays at the intersections of C St SW & Ellingson Rd/41st St SE, A St SE & Ellingson Rd/41st St SE, and at SE & 44th St SE (private road). The project will provide active transportation facilities that support mode shift and improved vehicle and active transportation safety. The improvements would likely be implemented with multiple projects implemented over time as funding is available.

COMP-26: A St SE & 12th St SE Intersection Improvement

Intersection delays will be reduced through the replacement of the stop control with construction of a new traffic signal.

Estimated cost: $1,425,000

COMP-27: A St SE & 21st St SE Intersection Improvements

Intersection delays will be reduced through the replacement of the stop control with construction of a new traffic signal. Improvements may also include widening for a northbound u-turn to support access management along the corridor.

Estimated Cost: $1,925,000