Original sentence: There are currently free shuttles between Tukwila International Boulevard Station and SeaTac/Airport Station, which will (presumably) be discontinued when Airport Link is opened.Way South, it again becomes grade separated on an elevated bridge and runs alongside Boeing Access Road, East Marginal Way South, Interurban Boulevard, SR 599, and I-5
Edited sentence: There are currently free shuttles between Tukwila International Boulevard Station and SeaTac/Airport Station, which will be discontinued when Airport Link is opened.Way South, it again becomes grade separated on an elevated guideway and runs alongside Boeing Access Road, East Marginal Way South, Interurban Boulevard, SR 599, and I-5