(Portland, OR) -- MAX passengers who ride the Blue and Red line trains through the Robertson Tunnel will face major delays the week of September 7th. Crews will be making repairs to the track. MAX trains won't run between the Sunset Transit Center and Providence Park. Passengers will have to take shuttle buses that could add 45 minutes to their trip. Shuttle buses will run every five minutes weekdays and every seven minutes during the weekend. Service resumes Sunday, September 14th.