Sound Transit is giving a most service boost to light rail later this month. In an announcement last night, the agency revealed that light rail frequencies would be improved to every six minutes during peak morning and afternoon hours each weekday. The improved frequency isn’t insubstantial; going from 7.5-minute to 6-minute frequencies during the peak represents a nearly 25% increase. The agency says that this service improvement is part of an effort to prepare for forthcoming service to Capitol Hill and the University of Washington due early next year. Here’s how the changes stack up against the service of today:

Central Link Weekday Frequencies

5am-6amEvery 15 minutesEvery 15 minutes
6am-8.30amEvery 7.5 minutesEvery 6 minutes
8.30am-3pmEvery 10 minutesEvery 10 minutes
3pm-6.30pmEvery 7.5 minutesEvery 6 minutes
6.30pm-9pmEvery 10 minutesEvery 10 minutes
9pm-1amEvery 15 minutesEvery 15 minutes

Service increases will begin on Monday, September 28th. For full timetables of northbound and southbound trains, visit Sound Transit’s new schedule page.


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  1. During much of the construction phase of Link light rail, Sound Transit told people that peak-hour headways would be 6-minutes. I was part of the community outreach team conveying that message. But then a year or so prior to the July 2009 opening, the decision was made to stretch those peak headways to 7.5 minutes. I’m glad to see them get back to the original operation plan.

    Bigger question now, however, is does Sound Transit still plan to operate 2-car trains when ULink opens next March? They have the fleet to operate 3-car trains, but last I heard the operation plan was still for two cars only.

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