Beginning March 9, crews building the future north portal of the SR 99 tunnel will close a single lane in both directions of SR 99/Aurora Avenue North between Valley Street and the Aurora Bridge. Two lanes will be open in each direction while crews install foundations for four large sign structures in the median and curb areas.
Closure details and schedule
Work is planned in two phases. View a map of the work locations.
Phase 1 (approximately 8 weeks): one lane closed in both directions for median work
One lane in the northbound and southbound directions will be closed around-the-clock while crews install four sign foundations in the median
Phase 2 (approximately 4 weeks): one lane closed in southbound direction for curb work
WSDOT understands that these closures will be inconvenient for those who use SR 99 on a regular basis. As such, this work is being completed in winter and early spring to take advantage of typically lower traffic volumes and to avoid conflicts with the recent football season and upcoming major summer events.
Construction schedules are inherently unpredictable due to weather and other factors. Durations shown for each phase are approximate and may change. We will keep the public informed as we prepare for Phase 2 work.
Bus rider information
Because northbound and southbound buses will travel – and stop – in the outside lanes with other vehicle traffic, trips may take longer than normal. During both phases the southbound bus-only lane restriction will be lifted.
Nighttime and weekend work
In an effort to balance the needs of drivers and residents, some work will occur during nighttime and weekend hours. An additional lane may close at night and during some weekend days.
The long-term lane closures are expected to cause additional backups on SR 99 for vehicles and buses, particularly during peak commute times. WSDOT is encouraging drivers and bus riders to:
Contact us at email@example.com or 1-888-AWV-LINE (298-5463) or visit us at www.AlaskanWayViaduct.org.