Thank you for your interest in the South Downtown I-405 Access Study. The consultation period for this online open house has concluded.

• Lake Hills Connector southbound on-ramp

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  This alternative includes a southbound on-ramp from Lake Hills Connector to southbound I-405. It complements the existing I-405 northbound off-ramp to Lake Hills Connector.

  Alignment with adopted plans and policies	Travel time (compared to no build)	Access and safety	Impact on property development	Cost
  Adds auto access only; no bike lanes and sidewalks, no east-west connection No significant policy conflict with the exiting land use and urban design policies Permanent impacts from shade, lighting, noise and water quality	Saves 500 daily person hours Reduces intersection delay by six percent	Restricts westbound left turns from Northeast Fourth Street onto I-405 southbound	No property impact identified Added access to I-405 supports future economic development	$150 million

  
  

• Southeast Sixth Street extension and southbound on-ramp

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  This alternative elevates and extends Southeast Sixth Street over 114th Avenue Southeast and I-405 to Lake Hills Connector and builds an on-ramp to I-405 southbound. This new ramp would pair with the existing I-405 northbound off-ramp to Lake Hills Connector to form a half-diamond interchange. This alternative provides bike lanes and sidewalks on the new east-west connection.

  Alignment with adopted plans and policies	Travel time (compared to no build)	Access and safety	Impact on property development	Cost
  Adds new access to I-405, multimodal with east-west connection East Main transit-oriented development plan did not envision a ramp at Southeast Sixth Street; requires policy amendment Likely temporary impacts to wetlands during construction Permanent impacts from shade, lighting, noise and water quality	Saves 700 daily person hours Reduces intersection delay by ten percent	Includes separate bike lanes and sidewalks along north side of Southeast Sixth Street extension over I-405 Extending Southeast Sixth Street to Lake Hills Connector over I-405 removes direct connection between 112th and 114th avenues southeast.	Planter strip and potential parking lot impacts along 112th, 114th, and 118th avenues southeast and Southeast Sixth Street Additional access to I-405 supports future economic development	$175 million

• Southeast Sixth Street extension inside access

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  This alternative elevates and extends Southeast Sixth Street over 114th Avenue Southeast and I-405 to Lake Hills Connector and builds direct I-405 express toll lane access ramps to and from the south. It provides bike lanes and sidewalks on the new east-west connection.

  Alignment with adopted plans and policies	Travel time (compared to no build)	Access and safety	Impact on property development	Cost
  Adds new access to I-405, multimodal with east-west connection East Main transit-oriented development plan did not envision ramps at Southeast Sixth Street; requires policy amendment Likely temporary impacts to wetlands during construction Permanent impacts from shade, lighting, noise and water quality	Saves 1,400 daily person hours Reduces intersection delay by seven percent	Includes separate bike lanes and sidewalks along north side of Southeast Sixth Street extension over I-405 Extending Southeast Sixth Street to Lake Hills Connector over I-405 removes direct connection between 112th and 114th avenues southeast	Planter strip and potential parking lot impacts along 112th, 114th, and 118th avenues southeast and Southeast Sixth Street Added access to I-405 supports future economic development	$325 million

• Northeast Second Street extension

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  This alternative extends Northeast Second Street to 116th Avenue Northeast without ramp connections to I-405. It provides bike lanes and sidewalks on the new east-west connection.

  
  

  Alignment with adopted plans and policies	Travel time (compared to no build)	Access and safety	Impact on property development	Cost
  Adds east-west multimodal connections No new freeway access to support growth Right-of-way needs reduce redevelopment potential Permanent wetland, stream, shade, lighting, noise and water quality impacts	Saves 100 daily person hours Increases intersection delay by seven percent	Includes bike lanes and sidewalks on the north and south side of Northeast Second Street Requires elevating Northeast Second Street over 114th Avenue Northeast and I-405 to connect to 116th Avenue Northeast Travelers must use Southeast Sixth Street to access properties along 114th Avenue Southeast	Significant property impacts both north and south of Northeast Second Street on the west side of I-405. Does not add freeway access capacity to support economic development	$125 million

• No build (no new interchange)

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  This alternative assumes no transportation improvements. The city is using this baseline to compare other alternatives.

  Alignment with adopted plans and policies	Travel time	Access and safety	Impact on property development	Cost
  Both the city’s Comprehensive Plan and WSDOT’s I-405 Master Plan call for a new interchange in the South Downtown area No new access to support growth Maintains existing conditions with no further critical area impacts	This alternative establishes a baseline to compare travel time savings for the other alternatives	Without adding access to I-405, the city and WSDOT expect congestion to increase and lead to more rear-end collisions	Does not require acquiring property to build improvements No additional access to support future property developments	No cost