CHOKEPOINTS

Diverging Diamond interchange is making progress in Lacey

May 23, 2019, 6:53 AM
Diverging Diamond wsdot...
(WSDOT)
(WSDOT)

A lot of drivers are going to get their first look at the state’s newest interchange as they drive around for Memorial Day. This diverging diamond feature is the first of its kind in Washington state.

KIRO Radio Traffic Townhall: Talking road rage, distracted driving, and more

If you haven’t traveled between Tacoma and Olympia lately, you will notice a big change around Lacey. Work has been underway for two months on the new interchange at Marvin Road. The Washington State Department of Transportation has moved a lot of dirt and the area looks quite a bit different.

WSDOT has also started paving a new frontage road that runs along the freeway in the southbound direction. I drove through this spot last weekend and it really feels a lot wider with that lane to your right, even though it’s not part of the freeway. I-5 has a different feel and is, visually, much different.

As for the project itself, work is on hold for the Memorial Day weekend, but a major change is coming next week.

“We’ve reached a point in the construction where we have to work where people normally drive,” said Doug Adamson with the Washington Department of Transportation.

The Marvin Road overpass will be closed from Friday night, May 31, to Monday morning, June 3. The off-ramps to Marvin Road will also be closed, but when they re-open, the detour that drivers have been using on southbound I-5 to Marvin Road will be gone.

“All traffic comes off the southbound exit to Marvin Road has been detoured up and around local streets to come back onto southbound Marvin Road, while we essentially rebuild one quadrant of the overpass,” Adamson said.

The Marvin Road detour has been in place since mid-April. Drivers will once again be able to turn left at the light, over I-5 to the shopping area.

This is the first diverging diamond interchange under construction in the state. There are plans to build one where Highway 18 meets I-90 in Snoqualmie and another where the extension of Highway 167 crosses I-5 in Fife, which is part of the Gateway Project.

If you don’t know what a diverging diamond is, be sure to check out the video here.

The simple explanation is that you drive on the opposite side of the road than you are used to when you go over the freeway. Follow the signs. This allows you to make a direct left turn onto freeway on-ramps without having to worry about cross or on-coming traffic.

The layout reduces crashes and congestion. It’s a little weird your first time, but it will make sense after you try it.

The interchange is expected to open in 2020.

Chokepoints

speed cameras...
Chris Sullivan

Speed cameras on freeways? Seems like a quick way to make roads safer

We have them in school zones, and we have them at intersections, is it time to put speed cameras on the freeways to keep speeds down?
1 day ago
wsdot...
Chris Sullivan

WSDOT is hiring, but can it keep people from bolting for better pay?

The Washington Department of Transportation is back to pre-COVID-19 staffing levels, but can the agency keep those hires from leaving?
3 days ago
gas...
Chris Sullivan

Gas prices have been creeping up, but who’s responsible?

Gas prices are on the rise again in Washington, and it doesn't have anything to do with the war in Ukraine or supply issues in the U.S.
7 days ago
Everett I-5...
Chris Sullivan

Emergency repairs to close multiple I-5 lanes in Everett this weekend

State transit officials are going to close two of the three northbound I-5 lanes around Marine View Drive in Everett all weekend. 
8 days ago
tow truck...
Chris Sullivan

Tow truck drivers beg for more protection on our roads

They clear our roads, many times in the dark of night, with no protection. Is it time to give tow truck drivers more visibility on our roads?
10 days ago
homeless boulder...
Chris Sullivan

Boulders return to prevent homeless camps along WA highways

Let's talk about boulders -- specifically, the use of boulders to prevent homeless camps from returning to sites along freeways and highways.
15 days ago

Sponsored Articles

safety from crime...

As crime increases, our safety measures must too

It's easy to be accused of fearmongering regarding crime, but Seattle residents might have good reason to be concerned for their safety.
Comcast Ready for Business Fund...
Ilona Lohrey | President and CEO, GSBA

GSBA is closing the disparity gap with Ready for Business Fund

GSBA, Comcast, and other partners are working to address disparities in access to financial resources with the Ready for Business fund.
SHIBA WA...

Medicare open enrollment is here and SHIBA can help!

The SHIBA program – part of the Office of the Insurance Commissioner – is ready to help with your Medicare open enrollment decisions.
Lake Washington Windows...

Choosing Best Windows for Your Home

Lake Washington Windows and Doors is a local window dealer offering the exclusive Leak Armor installation.
Anacortes Christmas Tree...

Come one, come all! Food, Drink, and Coastal Christmas – Anacortes has it all!

Come celebrate Anacortes’ 11th annual Bier on the Pier! Bier on the Pier takes place on October 7th and 8th and features local ciders, food trucks and live music - not to mention the beautiful views of the Guemes Channel and backdrop of downtown Anacortes.
Swedish Cyberknife Treatment...

The revolutionary treatment of Swedish CyberKnife provides better quality of life for majority of patients

There are a wide variety of treatments options available for men with prostate cancer. One of the most technologically advanced treatment options in the Pacific Northwest is Stereotactic Body Radiation Therapy using the CyberKnife platform at Swedish Medical Center.
Diverging Diamond interchange is making progress in Lacey