Albert Barnes on Acts 16:8

Came down to Troas. This was a city of Phrygia or Mysia, on the Hellespont, between Troy north, and Assos south. Sometimes the name Troas, or Troad, is used to denote the whole country of the Trojans, the province where the ancient city of Troy had stood. This region was much celebrated in the early periods of Grecian history. It was here that the events recorded in the Iliad of Homer are supposed to have occurred. The city of Troy has long since been completely destroyed. Troas is several times mentioned in the New Testament, 2Cor 2:12, 2Ti 4:13, Acts 20:5.

(a) "Troas" 2Cor 2:12