Washington

[kkt]

When I see the name Parkway, I think of a road that's landscaped on both sides, like a Road through a Park.  Not a few miles of strip mall.

[jakeroot]

Likewise, I don't think of a 40 mph arterial with three hundred traffic lights as a "speedway".

Something brand new would be way cooler. Maybe "Terminal Way".

[kkt]

You're gonna die if you go that way?

[jakeroot]

You're gonna die if you go that way?

[Mukilteo Ferry] Terminal Way.

There are quite a few other "Terminal Way" designations in other parts of the country, chiefly near airports or other cargo-handling places.

[pderocco]

Likewise, I don't think of a 40 mph arterial with three hundred traffic lights as a "speedway".

Depends on how they time the lights.

[TEG24601]

You're gonna die if you go that way?

[Mukilteo Ferry] Terminal Way.

There are quite a few other "Terminal Way" designations in other parts of the country, chiefly near airports or other cargo-handling places.

It would be hilarious if WSDOT gets involved and they have to call is "Whidbey Island Highway" or "Whidbey Island Blvd", given how much distain residents of old Mukilteo have towards the ferry and ferry traffic.

[Bruce]

A new interchange on I-405 has opened at NE 132nd Street in Kirkland. A half-diamond with two roundabouts to serve Totem Lake and EvergreenHealth.

[The Ghostbuster]

How common are roundabouts in the state of Washington?

[Bruce]

How common are roundabouts in the state of Washington?

We've got a few hundred now apparently. Many intersections have been converted, but they're still somewhat rare in interchanges.

Multilane, high-traffic ones are very rare. Lake Stevens opened one months ago that is still having frequent collisions.

[jakeroot]

I wouldn't say they're "very rare" but, yes, a plurality of roundabouts are single-lane, but that's true throughout the US.

Unfortunately, it's true that they are usually accident hot-spots. Some that come to mind:

• WA-20 @ WA-20 Spur (Sharpes Corner): lane reductions have taken place;
• WA-510 (Marvin Rd) @ Pacific Ave (Lacey): lane reductions have taken place;
• Steptoe @ Columbia Park Trail (Richland): lane reductions have taken place, and the westbound approach had a meter installed;
• WA-16 @ Burnham Dr (Gig Harbor): both roundabouts were rebuilt to replace the original British design, but the western roundabout has undergone several changes (i.e. lane reductions) even after rebuilding.
• I-90 @ Bendigo Blvd (North Bend): lane reductions have taken place so many times, I lost count.

It remains to be seen if 405 @ NE 132nd will prove to be a mess like other multi-lane roundabouts. I'm cautiously optimistic, but the data seems quite telling.