The following carpool requirements are in effect for the I-405 Express Toll Lanes between NE 6th St in Bellevue and I-5 in Lynnwood.
Weekday peak hours: 3+ people in the vehicle
Weekday off-peak hours: 2+ people in the vehicle
To travel toll-free as a carpool on I-405 during the above times you must meet the occupancy requirements, have a Good To Go! account and Flex Pass set to HOV mode.
The I-405 express toll lanes are open to all vehicles under 10,000 lbs. GVW toll-free 7 p.m.-5 a.m. Monday-Friday, on weekends, and on the following holidays (according to WAC 468-270-120): New Years Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day.
To ride toll free, you need to have 2+ people in the vehicle. To travel toll-free as a carpool on SR 167 HOT lanes you do not need a Good To Go! pass.
Solo drivers using the SR 167 HOT lanes must have a Good To Go! pass to pay the toll.
Vehicles over 10,000 lbs. GVW are prohibited from using the SR 167 HOT lanes.
On SR 520 and Tacoma Narrows Bridge, carpoolers are not exempt from paying the toll.
All exemptions are set by the Washington State Transportation Commission.