Vincent's NT Word Studies
8. Passing by Mysia. Not avoiding, since they could not reach Troas without traversing it; but omitting it as a preaching-place.Came down. From the highlands to the coast.
Robertson's NT Word Studies
16:8 {Passing by Mysia} (parelqontes ten musian). Literally, passing alongside or skirting Mysia, neglecting it without preaching there. Strictly they passed through part of it to reach Troas. {To Troas} (eis troiada). this city, named Alexandria Troas after Alexander the Great, was the seaport of Mysia, though a Roman colony and not counted as part of either Asia or Bithynia. New Ilium, on the site of the old Troy, was four miles farther north. It was the place to take ship for Philippi. Twice again Paul will be here (#2Co 2:12; Ac 20:6).