Reader Michael Arnold tipped us off to new clocks at Rainier Beach and Mount Baker stations that count the time since the last train left the station. At Rainier Beach, the clock is installed on a pole by the northbound track before the crosswalk near existing train signals. At Mount Baker, it is installed on the overhead catenary support just south of the platform for southbound trains. “They’re designed to help keep the trains from bunching up on MLK,” according to Sound Transit spokesperson Bruce Gray. He says the “shorthand for operators is this – if flashing, hold. If solid, make your signal call to proceed.”
Every time a train passes by those points and leaves a station, the clock resets to 0:00 and begins counting up. The elapsed time flashes until 4.5 minutes have passed at Rainier Beach or 5 minutes at Mount Baker, then stays solid. Although trains are nominally 10 minutes apart during the day, I observed that trains depart as soon as possible which can be a minute or two under ten.
Watch the clock in action in this video.