MYNORTHWEST NEWS

Seattle’s new SR99 tunnel finally faces full traffic with 4 mile backup

Feb 6, 2019, 9:13 AM | Updated: 11:56 am

sr99 tunnel...

A two mile backup forms inside Seattle's new SR99 tunnel Wednesday, Feb. 6, 2019. (WSDOT)

(WSDOT)

Full use of Seattle’s new SR99 tunnel under downtown was delayed this week after snow kept many drivers off the road. Wednesday proved to be the test as commuters returned, and the result — a four-mile backup.

WATCH: A test drive through Seattle’s new tunnel

“The northbound SR99 backup nearly reaches the West Seattle Bridge,” KIRO Radio Traffic Reporter Chris Sullivan said. “Two miles above ground, and two miles below ground. The reason? Drivers are trying to exit at Republican in South Lake Union. The Dearborn off ramp is not open yet.”

“This is the first real commute with the 99 tunnel, I don’t count the last two days because of all the snow,” he said. “This appears to be people trying to use the one-and-only exit into downtown, which is at Republican. The northbound ramp to Dearborn, which will get you off at Pioneer Square, is not yet open. So I’m hoping this is an anomaly. It’s too early to make a judgment. Either way, our first real commute in the SR99 tunnel has been a suck fest. It’s not been great. You drivers are sucking the exhaust from the cars in front of you.”

As Sullivan noted, one exit in the northbound direction is not open yet — the ramp to Dearborn Street. That could be causing some strain on traffic. It is unknown if the exit can relieve congestion once opened. As for Wednesday, however, the backup extended the entire length of the tunnel, and beyond.

“It turns out that everybody going through the tunnel, they are trying to get off at Republican, go to Dexter, then you have to peel off and go back into downtown,” Sullivan said. “That was one of the main concerns. This tunnel is a bypass with no exits, and some were worried that Republican ramp would not be able to handle the pressure. And today, it doesn’t look like it can.”

When the tunnel opened on Monday, traffic ran smoothly. Sullivan took a couple drives through the tunnel and had plenty of positive things to say. Of course, that was when snow prevented commuters from using the passage.

MyNorthwest News

seattle center diwali festival...

Charlie Harger

Harger: Kids danced at Seattle Center’s Diwali festival. 2 men showed up with racist signs

Saturday at the Seattle Center Armory, kids were dancing on stage at Diwali. Then two men walked in with American flags. One sign used a slur for Indian people.

17 minutes ago

woodinville house fire...

Jason Sutich

1 dead in Woodinville house fire, another escapes through window

At least one person died in a house fire in Woodinville early Monday morning, and another escaped through a window.

1 hour ago

mountlake terrace dna skull...

KIRO 7 News Staff

Scientists looking to find relatives based off DNA of partial skull found in Mountlake Terrace

Forensic genetic genealogists have processed the DNA of a partial skull found in a home that was sold in Mountlake Terrace in 2025.

2 hours ago

Aberdeen sex offender...

KIRO 7 News Staff

76-year-old Aberdeen sex offender arrested in Internet Crimes Against Children investigation

A 76-year-old in Aberdeen was one of two people arrested in separate Internet Crimes Against Children investigations in Grays Harbor County this past week.

2 hours ago

Diwali seattle center...

Heather Bosch, KIRO 7 News

Diwali celebrations continue despite disruption at Seattle Center

Lawmakers have condemned a video of a protest that has gone viral, showing two people interrupting a Diwali celebration at Seattle Center.

2 hours ago

Title Austin Leming...

James Lynch

Kent family seeks answers in 2021 disappearance and likely murder of Austin Leming

Nearly five years after Austin Leming disappeared from a Kent apartment complex, his family is still waiting to learn where he is.

2 hours ago

Seattle’s new SR99 tunnel finally faces full traffic with 4 mile backup