King County Metro TripPool

TripPool is a King County Metro pilot program providing on-demand rideshare options to connect riders to transit in select areas. Metro provided commuter vans make one round trip each work day to a Park & Ride or transit center. Volunteer drivers pick up and drop off registered riders along the way. TripPool trips are coordinated by riders and drivers on their smartphone through the free mobile app, iCarpool.


TripPool is a pilot program being tested by Metro in alternative service areas—currently seeking volunteer drivers on Mercer Island.

Request information or call 206-625-4500.

TripPool Fast Facts:

  • Each TripPool has at least two drivers to ensure reliability. The Metro provided vehicle includes gas, insurance, and maintenance along with the reserved parking.
  • Riders use iCarpool to choose from listed stops and drivers have the flexibility to make route adjustments.
  • Trip booking and fare payment is handled through the iCarpool mobile app.
  • TripPool trips are free for the active driver of the trip.
  • Riders pay for trips using iCarpool ‘ride credits’.
  • Free ride credits and program incentives will be provided to riders who link their iCarpool and accounts. For all TripPool trips, linked accounts are reimbursed for fares above $2.75 (one-zone peak).
  • Additional ride credits will be provided to riders who also provide their ORCA card to allow 100% reimbursement for all TripPool trips.
  • Accessible commuter vans are available. Please call 206-625-4500 to discuss your accessible vehicle needs for your TripPool trip.
(206) 625-4500
Type of Service: 
Vehicle Type: 
Service Area: 
Available throughout King County to various Park & Ride Lots.
Service Days: 
Su, M, Tu, W, Th, F, Sa
Service Hours: 
Advance Notice Notes: 
TripPool users can schedule their ride through the iCarpool App in the morning of your ride!
View the website for more informationfor Adults
View the website for more informationfor Seniors and people w/ disabilities
View the website for more informationfor Youth (ages 6-18)
Discounts Available
Link your iCarpool account to a free ridematch account at to be eligible for great rewards. Provide your ORCA card number on your account and get 100% reimbursement for all TripPool trips linking to transit.
Paratransit Eligibility Required: 
WheelchairFoldable wheelchairDoor-to-Door ServiceScooterWalkerCar Seat
King County Metro TripPool  graphic