Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP)
Confusion
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Chart Or Publication; Human Factors; Airport
Taxiing on Delta Taxiway the signage was confusing as to where Delta went and Alpha went.  I made the wrong turn on Alpha at the same time we caught it ATC asked us about being on Alpha.    We made a 180 and got back on D with no problems.  I was confused by the signs although we had the airport diagram out and had briefed; it still caught us off guard since this was the second trip the Captain had made to BOS.
CRJ700 Captain reports reports confusion while taxiing out for takeoff at BOS.