Tolling will be in effect on the I-405 express toll lanes weekdays, Monday through Friday, from 5:00 a.m. to 8:00 p.m. (excluding the weekdays on which holidaysi are observed).
When tolling is not in effect on the I-405 express toll lanes, including on weekends and holidaysi, the lanes are open to all vehicles regardless of occupancy, and a transponder is not needed to travel toll-free.
i New Years Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day.
Wash. Admin. Code § 468-270-078