Note: Directions have changed (Nov 2010) to account for usually heavy rush-hour traffic on 148th Ave NE.
Take I5 to SR520 eastbound.
Take the 148th Ave NE exit (northbound), at the top of the ramp continue onto 148th Ave NE going northbound. Turn right at NE 36th Street. Take the first driveway on the left.
From I405 Corridor
Take I405 to SR520 eastbound
Take the 148th Ave NE exit (northbound), then proceed North on 148th Ave NE. Turn Right at NE 36th Street. Take the first driveway on the left.
Once you arrive
Parking in the structure to the right of Building 99 is free. Building 99 is located to the left of the parking structure.
Microsoft Research website
If you don't know it already, the SR520 bridge is at best, a poorly disguised parking lot. It takes
to cause it to switch functions.
Before you attempt crossing Lake Washington this way, check the
WSDOT traffic web
to see if the bridge has already become a parking lot. Listen to the traffic reporters on the radio or use your GPS device to monitor traffic conditions.
If SR520 is stopped, your alternate routes are to drive around the north end of Lake Washington (Lake City Way), or to use I-90. I-5 north to I-405 south also works; it's about the
same between driving further at freeway speed and the shorter route on surface streets.
If you are already south of SR520, use I-90 to cross the lake, and then go north on I-405 to connect with SR520.
Even if you are not south of SR520, it can be worthwhile to take the "long way" via I-90. I-90 has more capacity, and it has HOV lanes if you're carpooling.
SR520 Bridge Toll
The SR520 floating bridge now is a toll bridge.
Here is WSDOT's site:
- If you have established an account with the WSDOT, then your account will be dinged when you cross the bridge.
- If you have an account, but don't have the RFID transponder, then your crossing will cost another $0.25.
- If you don't have an account, and you cross the bridge, WSDOT photographs your license plate and they will
mail you a bill for the crossing. This option costs $1.54 additional beyond the toll.