ION ALERT With ongoing airport roadway construction, customers who are traveling east=ound on the Grand Central Parkway (GCP) and require access to Terminals C =nd D may prefer to use an alternate route to bypass on-airport roadways. <= href="http://e.delta.com/a/hBcOGc$B8LP6IB8StL8NyVTD7.B8LP6IO0/Igacons"