Getting around after Seattle tunnel opens: Driving northbound on SR 99
If you're driving northbound on SR 99, here's where you will exit if you don't want to take the tunnel and where you will end up on the tunnel's north end.
Video: WSDOT
Author: KING Staff
Published: 1:27 PM PDT August 22, 2018
Updated: 10:31 AM PST February 2, 2019
GETTING-AROUND 3 Articles

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After the SR 99 tunnel opens through downtown Seattle, road configurations will change significantly. Here's a guide for northbound drivers to navigate surface streets in South Lake Union and SODO after the tunnel opens.

If you're a southbound driver, click here for those details.

RELATED: Seattle tunnel set to open to traffic Monday morning

EXPLORE

Getting around after Seattle tunnel opens: Driving northbound on SR 99

GETTING-AROUND
Chapter 1

Entering the tunnel

The south end portal of the tunnel is on SR 99 at South Royal Brougham Way, just west of CenturyLink Field.

If you are already on SR 99 and want to exit before the tunnel, you can take the right-side exit to Alaskan Way and South Dearborn Street, which connects to First Avenue South.

RELATED: SR 99 tunnel toll rates will range from $1 to $2.25 in Seattle

To get to the stadiums, take the Alaskan Way exit and turn right on Dearborn Street.

If you aren’t already on SR 99 and want to enter the tunnel, the northbound on-ramp is north of South Royal Brougham Way and Frontage Road.

sr 99 tunnel South portal - 16x9_1534967415113.jpg.jpg
Road configuration of the SR 99 tunnel's south portal.
WSDOT

WATCH: How to get to the SR 99 tunnel from downtown

Chapter 2

Exiting the tunnel

The north portal of the tunnel will be on SR 99 between Mercer and Harrison Streets.

If you want to get off SR 99, take the right-hand exit to Mercer Street and I-5. You can also turn right on Roy Street towards South Lake Union.

RELATED: What will Seattle traffic look like without the viaduct?

Getting on northbound SR 99 after the tunnel

Take the on-ramp to northbound SR 99 at Harrison Street and Aurora Avenue North.

seattle tunnel north portal map
The road configuration at the north portal of the new Seattle tunnel.
WSDOT
Chapter 3

No exits on Western or Seneca

There’s no SR 99 exits on Western Avenue or Seneca Street anymore.

To get to Belltown, you could exit SR 99 before the tunnel onto Alaskan Way. Take Alaskan Way north to Broad Street, which will connect to Western and Elliott Avenue.

RELATED: Seattle tunnel delays: Why the project is 3 years late

To get to downtown, you could exit before the tunnel at Alaskan Way and South Dearborn Street. Take a right on Dearborn to connect to First Avenue South.

downtown without columbia_1534970556846.png.jpg
There's no SR 99 exits on Western Avenue or Seneca Street anymore. To get to Belltown or downtown, you could exit SR 99 before the tunnel onto Alaskan Way.
WSDOT

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