Comments on: I-5 Undercrossing Wraps Up

By: DK

DK — Sun, 16 May 2010 14:04:26 +0000

Tunnels require little maintenance after they’re built. They’re essentially negative space inside solid rock. Elevated structures have to be constantly maintained. See NYC’s subway tunnels versus Chicago’s “L” system. Virtually no work has needed to be done to NYC’s tunnels in their 80-90 year history, whereas Chicago is constantly replacing segments of it’s elevated lines.

By: John Bailo

John Bailo — Sun, 16 May 2010 01:17:26 +0000

I don’t understand the logic for a tunnel versus elevated.

LINK has three modes: elevated, surface and tunnel.

They use the existing downtown tunnel…which makes sense there, but every else it seems to be the elevated would be the perfect combination of having a free right of way along with being cheap and easy to build.

Not only that, but I would imagine that an elevated line could be put up almost instantly whereas a tunnel takes forever to build.

Can someone school me in the (il)logic of tunnels?

By: Gordon Werner

Gordon Werner — Sat, 15 May 2010 00:04:12 +0000

the new ones start arriving in August I believe …

By: joshuadf

joshuadf — Fri, 14 May 2010 23:06:00 +0000

I’m glad for the work, but I was a little disappointed with the video. I though it was going to be video of the undercrossing work being done, like this pic I took
http://www.flickr.com/photos/joshuadf/4277561880/

By: alexjonlin

alexjonlin — Fri, 14 May 2010 16:07:58 +0000

They’re getting a lot of cars next year though right? That’d be cool to at least run three-car trains from Stadium Station after sports events around there.

By: Gordon Werner

Gordon Werner — Fri, 14 May 2010 07:53:09 +0000

maybe not regularly … but for games and such would be nice

By: Oran Viriyincy

Oran Viriyincy — Fri, 14 May 2010 07:44:39 +0000

ST spokesperson Bruce Gray said last month that “we’ve moved up the bumping post in the stub tunnel since we opened last July to make room for the coming U-Link work. Now we can only turn a two-car train around in there.”

I don’t think they have enough cars to regularly run 3-car trains.

By: Adam B. Parast

Adam B. Parast — Fri, 14 May 2010 07:17:48 +0000

I thought they could already run 3-car trains.

By: Adam B. Parast

Adam B. Parast — Fri, 14 May 2010 07:16:44 +0000

The tunnels always have lights it’s just a matter of whether you want to pay to power them all the time.

By: Gordon Werner

Gordon Werner — Fri, 14 May 2010 06:26:43 +0000

Does this mean they can start running 3-car trains?

By: Oran Viriyincy

Oran Viriyincy — Fri, 14 May 2010 03:52:15 +0000

It’ll probably be like the Beacon Hill tunnel.

By: Lloyd

Lloyd — Fri, 14 May 2010 02:35:58 +0000

I’m certain current safety and escape requirements require lighting in all newly built transit tunnels

By: alexjonlin

alexjonlin — Fri, 14 May 2010 02:14:55 +0000

I was wondering a while ago, will U Link tunnels be lit like the DSTT, or dark like a lot of systems around the world?

By: Charles

Charles — Thu, 13 May 2010 21:52:55 +0000

Great job guys!

By: barman

barman — Thu, 13 May 2010 20:05:08 +0000

U-Link can’t come fast enough… I wish it were finished!!

By: Tom

Tom — Thu, 13 May 2010 19:55:39 +0000

More videos like this please. Congratulations to Sound Transit, we need to be very supportive of community investments like this one, they make us all wealthier .

By: lazarus

lazarus — Thu, 13 May 2010 19:36:56 +0000

I think they were expecting early on to be finished early, but in the end they finished on schedule and under budget.

Good job ST. Under budget is a good thing!

Bring on the TBM’s.