Showing posts with label Seattle. Show all posts

Another major closure in the books

 By Lynn Peterson

What a summer.

Wildfires, flash floods, tornados. Our state has faced no shortage of unplanned challenges recently. In addition to causing more serious repercussions, these challenges strain our transportation system, particularly when they hit during a busy season of planned construction closures. Add it all up and you end up with a predictable outcome: delays and frustration for travelers trying to reach their destination.

New SR 99 at Broad Street
Today, as scheduled, we wrapped up a four-day closure of State Route 99 in Seattle that included two rare weekday closures of the highway. Before the closure started, we asked you to do your part to help. We suggested you plan ahead, change your travel mode or revise your commute, among other measures aimed at reducing congestion. As you did during major lane reductions on I-90 last month, you delivered. Traffic was more challenging than usual, but we expected that. And had you not heeded our suggestions, things would have been much, much worse.

Progress

Of course when you’re sitting in traffic, it’s easy to forget that the headaches we’re enduring have tangible benefits. In the case of the four-day SR 99 closure, we came away with plenty to show.

Most notably, crews building the future north portal of the SR 99 tunnel demolished and replaced the section of SR 99 that crosses above Broad Street in Seattle. It looks easy in this time-lapse video, but completing this work and reopening the highway in four days was no small feat. 

During the weekend portion of the closure, crews replaced 81 concrete panels on SR 99 south of downtown, repaired an expansion joint at the Seneca Street off-ramp from northbound SR 99 and cleared ivy from the Alaskan Way Viaduct to make future maintenance of the structure easier.

With more than 18,000 miles of highway under our care, we’re always getting ready for the next big push. There will be more closures, more travel challenges. But please be assured that we spend a significant amount of time and energy coordinating our work in advance, and doing everything we can to minimize delays for the traveling public.

When the next big closure approaches, we’ll again ask for your help. Let me say in advance, on behalf of your fellow travelers, thank you. Your help, and your patience, benefit everyone as we work together to maintain and improve our state’s transportation system.

Get ready: Four-day closure of SR 99 begins Friday at 10 p.m.

By Chad Schuster

In October 2011, we closed State Route 99 through Seattle for more than a week so we could demolish and replace the southern mile of the Alaskan Way Viaduct. Traffic was a challenge during the closure, but with help from flexible and patient commuters, we made it through and ended up with a better highway to show for it.

On Friday night, we’ll begin another extended closure of SR 99, this time a four-day closure that will enable crews to demolish and replace (pdf 2.5 mb) a section of the highway at the north end of downtown. As it did three years ago, we expect that closing SR 99 will cause congestion and perhaps frustration among travelers trying to get to and through Seattle. But with your help, we’ll manage, and we’ll complete important work related to our efforts to replace the remaining section of the viaduct.
 
Please plan ahead for SR 99 closures from Friday night, Aug. 22 to Wednesday morning, Aug. 27. Here are the details:

  • From 10 p.m. Friday, Aug. 22 to 5 a.m. Monday, Aug. 25, SR 99 will be closed in both directions from the West Seattle Bridge to Valley Street.
    • Northbound SR 99 will be open from South Royal Brougham Way and southbound SR 99 will be open from Columbia Street until midnight on Friday, Aug. 22 for exiting Seahawks traffic.
  • From 5 a.m. Monday, Aug. 25 to 5 a.m. Wednesday, Aug. 27, SR 99 will be closed in both directions from the south end of the Battery Street Tunnel to Valley Street.

Lots of work to do

It’s never easy to close a major highway, but it might make it easier to accept if you know how much work we’ll be able to accomplish due to the sacrifices being made by you and your fellow travelers. The main need for the closure is to allow crews building the future north portal of the SR 99 tunnel to demolish and replace the section of SR 99 that crosses above Broad Street. To minimize the need for additional closures, separate crews will complete the following work elsewhere along the SR 99 corridor during this time:
  • Utility work at Harrison Street
  • Concrete panel replacement in SODO
  • Expansion joint repairs on the viaduct near the Seneca Street off-ramp
  • Ivy removal from the viaduct

Driver tips 

The closure will likely cause backups on city streets and I-5. Travelers should consider the following:
Thanks in advance for your patience, and for doing your part to minimize congestion as we build a better SR 99 corridor.


I-90 bridge to close for Seafair jets

by Bart Treece

After a one-year break, some old friends have booked a return flight. The skies above Seattle will again be the playground for the F/A 18 Blue Angels of Seafair. This of course means the Interstate 90 floating bridge between the Emerald City and Mercer Island will be closed periodically for safety precautions. In other words: no drivers, cyclists or walkers.

Courtesy: US Navy
Courtesy: Patriots Jet Team

The Federal Aviation Administration requires a safety zone below the area where both the Blue Angels and the Patriots Jet Team practice and show-off for captivated crowds. This zone, we call “the box,” covers part of Lake Washington and the floating bridges - hence the closure.

Airshow Safety Zones
Traffic
With the Blue Angels back in the Seafair lineup, both directions of I-90, (including the mainline and the express lanes) will be closed between I-5 in Seattle and Island Crest Way on Mercer Island.

Here’s the closure schedule:

  • Thursday, July 31: 9:45 a.m. - noon; 1:15 - 2:40 p.m. (practice) 
    • Express lanes closed from 9:45 a.m. to 2:40 p.m. 
  • Friday, Aug. 1: 12:15 p.m. - 2:40 p.m., (practice) 
    • Express lanes closed from 12:15 to 2:40 p.m. 
  • Saturday, Aug. 2: 12:15 p.m. - 2:40 p.m., (full show) 
    • Express lanes closed from 12:15 to 2:40 p.m. 
  • Sunday, Aug. 3: 12:15 p.m. - 2:40 p.m., (full show) 
    • Express lanes closed from 12:15 to 2:40 p.m.

Additionally, several ramps to I-90 will be closed during these times.

SR 520 floating bridge
The State Route 520 floating bridge will remain open for traffic and tolls will be collected according to the rate schedule. There will be no boat openings while the I-90 bridge is closed. You can expect heavier traffic on SR 520 and other routes between Seattle and the Eastside. To help keep traffic moving throughout Seafair weekend, the east navigation channelwill be open to boats up to 58 feet tall which should reduce the number of marine openings.


Regardless of where you travels take you Seafair weekend, be sure to plan your trips beforehand and know before you go.

#I90to1 keeps on truckin'

by Bart Treece

Something has been missing from the morning commutes this week, where westbound I-90 has been reduced to a single lane near Bellevue Way for expansion joint replacement. Traffic has moved relatively smoothly so it’s only natural to ask, “Where are the foreboding traffic tie-ups the clairvoyants of the commute have dubbed, ‘Carpocalypse?’”

Click to view a Storify from today's tweets


The smooth sailing on the expressway and throughout the Eastside and Seattle area can be attributed to you, the commuter. You are doing your part in keeping regional traffic moving during construction. The proof is in the numbers. If you’re ready to get your inner traffic geek on, here you go.

Follow the red line on this graph which shows the commute beginning earlier on Monday, and then holding steady throughout the day, effectively spreading the traffic. Drivers left for work earlier, with the single westbound I-90 lane carrying nearly double the number of typical vehicles in the 4 a.m. hour. By 7 a.m., the peak hour of diversion, westbound I-90 was carrying nearly 60 percent fewer cars and trucks. 


With folks diverting to other routes or staying off the road, it allowed drivers to squeeze into a single lane approaching the construction zone. Travel times from Issaquah to Seattle peaked at 35 minutes. So, even though it looked like a small backup approaching, it was still a slog.


Construction
The toughest part of the construction work is welding the two halves of the expansion joints that equal 82 feet. This began at 6 a.m. today, and could take up to 30 hours. After the work passes a series of tests, concrete will be poured in to seal the joint and will need time to harden. To get an idea of why this work needed to happen, here's a look at one of the expansion joints the contractor pulled out.



These circles show the cracks in the steel, and there's not much keeping it together.



With previous closures, we've seen drivers return to their old habits after a few days, which results in longer travel times and bigger backups. Hopefully, everyone will keep doing what they've been doing so come Friday, life can return back to normal.



Advice from the afternoon @wsdot_traffic gal could save you from spring fever this weekend

By Harmony Haveman Weinberg, aka @wsdot_traffic afternoon gal

Hooray! Spring has officially arrived! However, that excitement could turn into a headache if you do not plan ahead for some major traffic impacts this weekend. There are so many closures to tell you about, it’s tough to do in more than 140 characters.  But, I’ve got you covered. We’ll get through this together.

Closure hot spots include I-5, I-405 and SR 99:

Let’s take a look at the big picture. There are closures happening throughout the weekend on three major roadways in the area. Click on the map to the right to get a good idea of where you can expect to see backups and added congestion.

Now let’s divulge into the nitty-gritty details.

Here’s what’s closed:

I-5 in Seattle

Mercer Street ramps to I-5

  • 8 a.m. to 6 p.m. both Saturday and Sunday - The City of Seattle will close the Mercer Street on-ramps to both north and southbound I-5 to install traffic detection equipment.

SR 99 closures in Seattle

  • 11 p.m. Friday to 10 a.m. Saturday - All southbound lanes of SR 99 will be closed between Valley and Thomas Streets for girder settings as part of the City of Seattle’s Mercer Corridor project.
  • 4:30 a.m. to 7 p.m. Saturday - All lanes of the Alaskan Way Viaduct will be closed between South Spokane Street and the Battery Street Tunnel for bridge inspection.

I-405 closure in Bellevue

  • 11 p.m. Friday to 4 a.m. Monday - Eastside drivers will need to use alternate exits on I-405 to reach downtown Bellevue as the southbound off-ramp to Northeast Eighth Street will be closed all weekend for drainage and barrier work.

Heaviest traffic backups

Since I watch traffic every weekday afternoon to bring you the most up to date information, I have a good idea of what you can expect this weekend. Westbound I-90 coming into Seattle will get backed up. That said, the westbound I-90 express lanes will be open to help alleviate some of the congestion.

Going shopping? If you plan to join me in finding some good sales this weekend in Bellevue, expect heavy backups on southbound I-405. The ramp to Northeast 8th Street will be closed. You will want to take the Northeast 4th Street exit instead. Northbound I-405 drivers will want to take the Northeast 8th Street off-ramp, because that part will still be open.

Heading northbound I-5 into Seattle? You will see backups too. Our brilliant traffic engineers point out this can be a heavy travel spot even without lane closures. Drivers could start to see slowdowns at Boeing Field. The I-5 express lanes will help ease up some of the backups.

What *YOU* can do

  • Delay or combine your trips if possible.
  • Carpool or take public transit.
  • Follow us on Twitter! We will be working throughout the weekend! Our team will stay on top of the traffic conditions.
  • Get the app!
  • Most importantly – be informed about the closures and plan your weekend around them.

Expansion joint repair, in Seeeeeaattttllle, in Seeeeeaattttllle!

By guest blogger Bart Treece

A sky of blue, a sea of green and a river of red brake lights….OK… that’s not how it goes, but that’s what folks could be seeing this weekend, unless they plan ahead  for congestion.

Let me explain. There are so many things to do this weekend in Seattle, and sitting in traffic shouldn’t be one of them when you’d rather be cheering the Sounders on against Sporting KC, enjoying the Seattle Dog Show or watching the women of the Pac-12 battle it out on the hardwood. With so much happening it might be kind of tough to get to where you want to be on time without some preplanning.

What’s going on?

Our contractor crews will be closing all but one lane on the northbound I-5 collector-distributor, which runs parallel to the wider section of I-5 between I-90 and Madison Street. The collector-distributor or “C-D” as it’s known in traffic-talk, helps merge cars from I-90 to I-5 and downtown off- and on-ramps. Here’s some nifty animation that shows how vehicles will navigate through the work zone.

The closure is the fifth of nine in this part of I-5 to replace 26 worn and aging bridge expansion joints before they go bust, which would lead to flat tires, emergency closures and major headaches. It’s happened before, and it ain’t pretty.
Emergency repairs to a damaged expansion joint in Dec. 2013

Traffic tips

Plan your trips ahead of time and know before you go. Carpooling, taking transit, delaying or combining trips will help reduce congestion in the area for everyone. Use alternate routes. If you can, take the backdoor into downtown Seattle on SR 599 to SR 99. We often see free-flowing traffic on this under-utilized route during weekend closures ...just sayin’.

With heavy traffic expected on westbound I-90 into downtown, SR 520 might be a better cross-lake route. The I-90 express lanes will look good westbound, and will be open to all (both carpoolers and solo drivers) during times of high congestion (keep an eye on the highway signs). Sounders fans should expect some delays heading eastbound after the match, so hanging in Pioneer Square for an hour to let traffic settle down would be a good idea. To head north from SoDo, take SR 99 or use surface streets to access the Cherry Street on-ramp to I-5 or the 5th Avenue & Cherry ramp to I-5 express.

You can always see how traffic is or isn’t moving through the area on the Seattle Traffic page or with the WSDOT mobile app for iPhone and Android devices.

There’s really never a “good” time to tighten traffic, but we really appreciate your patience and understanding when we do have closures for construction. Knowing ahead of time and planning for congestion really helps keep people moving, and we appreciate everyone for chipping in.

Advice from the afternoon @wsdot_traffic gal could save you heartache over the long weekend


By guest blogger Harmony Haveman Weinberg, aka @wsdot_traffic afternoon gal

As the official eyes of the afternoon Seattle commute, I see gnarly, nasty, unexpected and unpredictable traffic backups. Just how bad is the frustration among those stuck in a backup? Well, imagine being around your sweetie who did not receive flowers on Valentine’s Day. Yes. Drivers can feel that frustrated.

(Pssst: The holiday is Friday, Feb. 14! You’ve been warned.)

While some traffic events are unavoidable, dealing with major backups on southbound Interstate 5 in Seattle this weekend can be prevented. How? Well, it’s really all up to you, the individual driver.

You have the power, but I want to help.

I have some tips to guide you. Consider this my Valentine’s gift to you. But unlike the mystery of an unmarked box of chocolates, these tips will help you know what you are going to get.What’s that? You want to give me a gift, too? Here’s what I’d really like (besides roses and chocolate, of course): Help us spread the love this Valentine’s Day weekend by making sure all your loved ones get the message and plan ahead too.

When can I expect major backups this weekend?
  • Any time from 9 p.m. Friday, Feb. 14 through 5 a.m. Tuesday, Feb. 18

Where’s the construction?
  • Two of three lanes on southbound I-5 between Pine Street (just north of the Washington State Convention Center)  and I-90 in downtown Seattle. During the closure we will replace four highway-wide expansion joints.
Crews chipped away concrete and debris last month in preparation
to replace a 50-year-old expansion joint.

But I have to drive into Seattle this weekend!
  • Avoid southbound I-5 into the city if possible. SR 99 is the best alternative.
  • All on- and off-ramps in downtown Seattle will remain open.
  • We’re keeping the I-5 express lanes open southbound until 3 p.m. Saturday and Sunday. This helps provide more access to the downtown Seattle on- and off-ramps, especially useful for carpoolers (hint, hint). However, and I stress however, they will not help you avoid the big closure because where they end, the construction begins. The I-5 express lanes will operate southbound on Monday from 5 a.m. to 3 p.m.
  • Can you carpool? Take public transit? Take rail? Maybe work from home if you don’t get Presidents Day off?
  • Local streets are also good alternates.
  • If you plan to travel south of downtown, consider using southbound I-405.
Will I be able to access I-90?
  • You betcha! The collector distributor, which runs parallel to southbound I-5, will be open allowing you to access I-90.  See map below.

History speaks for itself:
  • We’ve had closures like this before. A few weeks ago it took folks traveling northbound about 50 minutes to get through the work zone. The alternate routes were underutilized. This weekend can be different, but the keys to change this are in the hands of drivers. Have your plan ready to go and avoid backups.
Why is the closure happening on the long President’s Day holiday weekend?
  • There’s really no good time to reduce southbound I-5 to one lane in Seattle. With that said, this is crucial work that needs to be completed as soon as possible. While we make sure road work isn’t taking up lanes on busy travel holidays like Memorial or Labor Day weekends, President’s Day is different. It’s not a holiday for everyone but historically there are fewer vehicles on the road. Also, by working until the wee hours of Tuesday morning we can pack two weekends worth of expansion joint repair work into a single one.
@wsdot_twitter will not leave you!
  • Follow us on Twitter! We will be working throughout the weekend! Our team will stay on top of the traffic conditions.
  • Get the app! Let’s just say, it could be your best friend this weekend (besides, of course, your Valentine)
Remember, you have the power to keep traffic backups to a minimum! Together… We can do this!

Help a highway out, plan ahead: a message from I-5 Seattle

 By guest blogger Broch Bender

Greetings drivers!

It’s your friend I-5 here with some important medical news to share with you.

You see, I recently had a checkup and it looks like 50 years of constant wear and tear on my highway expansion joints has caught up with me again. Yes, the prognosis is in; time for another regimen of expansion joint replacement surgeries through downtown Seattle.

Staring Friday night, WSDOT will call in the specialists to perform triage surgery on 26 of my aching, worn out joints. The first round of treatment starts this weekend, which requires more than half of my northbound lanes to be laid up through downtown Seattle until 10 a.m. Sunday morning.

The doc’s instructions call for nine weekends of lane closures between I-90 and the Washington State Convention Center to replace all 26 joints.

I realize these procedures could be painful for drivers, but ultimately the prescription delivers some relief too. You see, broken joints are not only hazardous to my health; they also put your car at risk for possible damage and can quickly choke your commute.

see caption
On Dec. 16, 2013, emergency expansion joint repairs caused
traffic to back up for two miles on southbound I-5 near
Spring Street. Ripping out and replacing expansion joints
puts the kibosh on emergency procedures like this one.

Here’s how you can help an old highway get some relief this weekend:
  • Plan ahead by taking an alternate route. If you can bypass Seattle altogether, I-405 is a great way to get around the slowdowns heading into downtown.  If not then good old Highway 99 will get you there.
  • Before you leave, check the WSDOT Seattle Area traffic map. If you see red or black near I-90  that means it could take a while to squeeze through the construction closures.
see caption
Highway medics in action, replacing an expansion
joint on northbound I-5 near Corson, April 2013.
With your help, we’ll get through these nine weekends of joint replacement treatments together.

No need to send cards or honk your horn in support while driving through my operating room. The best way to support me on my road to recovery is to carpool, plan ahead for traffic delays and, if you can swing it, take those alternate routes.

I’ll do my best to be a good patient and recover just as fast as I can.

Yours,

I-5 shield











Interstate 5, downtown Seattle 

Added visibility comes to I-5 express lanes

By guest blogger Mike Allende


New flashing lights bring added visibility
to I-5 express lane gates.
The I-5 express lanes have been getting some much-needed attention during the past couple years. From automating the way we switch the directions of the lanes to new signs and important communications equipment, we continue to look for ways to help the always-busy stretch through Seattle run more efficiently and safely.

We’re in the middle of a $4.9 million upgrade to the express lanes between Northgate and downtown Seattle. The signs along the express lanes hadn’t received any significant improvements in about 20 years. We’ve already replaced five of them near the entrance at Northgate, and more are going up in December at the northbound James Street entrance. LED lights on the new signs will clearly let drivers know whether the lanes are open or not. While the express lanes normally operate on the same daily schedule, these improvements will still help guide drivers who might be unfamiliar with their hours of operations.

New LED signs let drivers know if the
I-5 express lanes are open or closed.
Besides the signs at Northgate, we’ve installed flashing lights on the directional gates. When they swing out during the midday switch to northbound, the lights will flash. When the gates are completely closed, they’ll stay red. We did this to improve safety around the gates: The lights should reduce the number of gate strikes while giving drivers another notice of whether the lanes are open or closed. The added visibility will also help alert drivers to merge if the lanes are closed, which should help ease some of the congestion southbound drivers approaching the Northgate exit know all too well.

We also replaced a variety of communications equipment near the Northgate entrance and will do the same near James Street. The equipment remotely relays information that lets our staff in the Traffic Management Center know that everything is ready for the switch. Once our road crews drive through the lanes to ensure they are clear, our TMC staff can efficiently switch the lanes with the press of a button.

New LED signs let drivers know if the
I-5 express lanes are open or closed.
These improvements come a little more than a year after we completed another major part of the project. We automated the express lanes last year, which reduces the amount of time it takes to switch directions. We also added 45 new cameras, signs, signals and communications equipment.

More than 50,000 vehicles use the I-5 express lanes on weekdays, with 60 percent of them heading north. Since automating the lanes, northbound drivers have seen about four minutes cut from their commute. Look for even more improvements with these new signs and equipment.

I-90 tolling proposal: Your feedback helps shape alternatives and tolling options

By guest blogger Emily Pace

I-90 Floating Bridge
As you may recall, earlier this year we conducted outreach on the proposal to toll I-90 between I-5 in Seattle and I-405 in Bellevue, including public meetings in Bellevue, Mercer Island and in Seattle, and a public comment period. We had a great turnout at the meetings, and in the end, received thousands of comments from the public and state and local agencies.

It’s important to remember why the Legislature asked us to study tolling I-90. The Cross-Lake Washington corridor – made up of the I-90 and SR 520 bridges – provides as a vital connection between our region’s major employment and population centers. We’re facing two key challenges with this corridor: funding the SR 520 - I-5 to Medina Bridge Replacement Project to complete the SR 520 Program and relieving congestion on I-90.  To address these challenges, the Legislature asked us to evaluate tolling I-90 and complete an environmental impact statement to examine other possible project alternatives.

Craig Stone, Assistant Secretary for the WSDOT Toll Division,
and Tolled Corridors Director John White discuss the I-90
EIS with members of the public attending the Bellevue
scoping meeting held October 10th.
How did we use the feedback we received from outreach earlier this year?
Many people suggested potential alternatives to tolling I-90 that may help meet the purpose of the project, which is to alleviate congestion on I-90 and fund SR 520 between I-5 and Medina. We used the suggestions to develop a list of potential solutions that fit into categories such as state or regional taxes, mileage fees, federal funding and adding new highway capacity. 

Many suggestions came from folks who live or work on Mercer Island.  When we discuss tolling I-90, we realize Mercer Island is in a very unique situation—fully reliant on I-90 to leave the Island in either direction.  As we continue with the environmental process and evaluate the variable tolling alternative, we’re only considering potential tolling options (pdf 404 kb) that would offer Mercer Island a free or discounted way off the island.

More input needed Oct. 6 through Nov. 7 on proposal and alternatives
We’re having another 30-day comment period and we need your feedback again – this time on the potential alternatives and proposal to toll I-90. You can provide your comments online, by mail or in person at a public meeting in Bellevue, Mercer Island and Seattle. Last time, many folks wanted a chance to give verbal comment at the public meetings, so this time around we’re offering the chance to speak at each meeting.

What are the next steps?
Ultimately, the Legislature decides whether or not to toll I-90. After the comment period ends on Nov. 6, we will compile all the comments and summarize key themes into a summary report. Your feedback will help determine which alternatives are studied in the draft environmental impact statement (DEIS) analysis. In mid-2014, we will publish the DEIS findings and allow the public another opportunity to comment. We plan to deliver the final report to the Legislature in early 2015.

Have more questions?
Check out our common questions on I-90 tolling to find an answer.

High-flying jets of Seafair, mean closures on the ground

Even though the Blue Angels are not flying over Seattle this year, there will still be closures of the Interstate 90 floating bridge while the Patriots Jet Team takes to the skies.

Similar to when the Blue Angels practiced and performed for Seafair, the I-90 floating bridge will still close to drivers, cyclists and walkers. The Federal Aviation Administration requires a Safety Zone for the area below the performance. We call it “The Box,” but really it’s more like a few rectangles crossing over each other. The northern part of the box covers the I-90 floating bridges, which is why they are closed during performances by both the Blue Angels and the Patriots Jet Team.

Courtesy: Patriots Jet Team

Traffic
Some minor changes from years past, the closures on I-90 will take less time, and there is no Thursday practice, therefore, no Thursday closure.

Here’s the schedule:
Friday, Aug. 2:  1:15 p.m. - 2:40 p.m. (Practice)
Saturday, Aug. 3:  1:15 p.m. - 2:40 p.m. (Full show)
Sunday, Aug. 4:  1:15 p.m. - 2:40 p.m. (Full show)

Additionally, several ramps will be closed at that time. The I-90 express lanes will also be closed from 12:30 to 3 p.m. each day, but are available in the event of a medical emergency that requires a trip to the hospital. Just call 911.

SR 520
The State Route 520 bridge will remain open for traffic and tolls will be collected according to the rate schedule. Good news for drivers, the bridge will not open for any boats during Patriots Jet Team flights. The bridge will be busy. If you need to take a cross-lake trip while the Patriots are in the air, just plan ahead. Outside of those times during Seafair weekend, the east navigation channel will be open to boats up to 59 feet, which should reduce the number of marine openings.
Whether you’re heading out to enjoy Seafair festivities, or just plain going somewhere else, remember to plan ahead and know before you go.

State Route 99 – Two years in the transformation of Seattle’s first freeway

By guest blogger Greg Phipps

In summer 2010 contractor crews working for WSDOT started work to replace the aging Alaskan Way Viaduct south of Downtown Seattle. Two years later the seismically vulnerable viaduct is gone and drivers are traveling on a brand new, seismically-strong State Route 99 from SODO to Pioneer Square. This section of SR 99 won’t be truly complete until it connects to the SR 99 tunnel at the end of 2015. Still, it’s pretty cool to see how replacing the southern mile of the viaduct has changed the landscape south of downtown.

The southern mile
Our first photo shows the southern mile of the viaduct in May 2010, before crews started building the new SR 99. Besides the viaduct, keep an eye on a couple things that will change. The first thing is Alaskan Way South, the street on the west side of the viaduct. The second thing is the railroad tracks between the viaduct and Alaskan Way South.















The southern mile in September 2011
One year ago crews were close to finishing the western half of the new SR 99, the piece that would eventually become the southbound lanes of the highway. What happened to Alaskan Way South? Part of it is in the footprint of the new SR 99 bridge, while the rest has become a construction zone. And the railroad tracks? They’ve moved west, out of the way of the new highway.
















Southern mile demolition – October 2011
Just one month later and the viaduct is a shell of its former self, literally. Demolition machines are hammering and crunching the double-deck viaduct into piles of concrete and rebar rubble.  In a little more than a week most of the southern mile has disappeared. Meanwhile, crews are getting ready to open the western half of the new highway and the construction bypass that takes traffic from the new highway up to the remaining section of the viaduct north of South King Street.
















The new Highway 99 - September 2012
It’s 11 months after the southern mile demolition and we’ve got twins!  Bridges, that is.  Southbound traffic rides on the west bridge and northbound traffic uses the east bridge, until they meet again and travel on a construction bypass around SR 99 tunnel construction.  On the photo trace a line from the end of the east bridge through the tunnel construction zone toward the blue cranes on the bottom right. That’s your route into the tunnel starting at the end of 2015.