Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 84; Flight Crew Total 10371; Flight Crew Type 7677
Situational Awareness; Confusion
ATC Issue All Types; Ground Incursion Taxiway
Flight Crew Became Reoriented
Airport; Human Factors
On taxi out of parking; contacted Ground for taxi clearance. Was given instructions to taxi [Taxiway] A; B1; Z; S2 for Runway 10L. On Taxiway Zulu; Ground asked us about the B1 signage. We told him that we saw the [Taxiway] B1 sign and proceeded B1 to [Taxiway] Zulu. After talking with Ground; we looked at the Jepps (Jeppesen) 10-9 taxi page and saw that after [Taxiway] A; the Taxiway B1 turns left to the northwest (approx. a 45 degree angle/ jog) to join [Taxiway] Zulu; where as we turned slightly to the left proceeding north to join [Taxiway] Zulu. The [Taxiway] B1 sign on Taxiway Alpha did not show any kind of directional arrow of the Taxiway B1 like many other airports that have similar offset taxiways. Talking with Ground Control; I am led to believe that we were not the only aircraft to make such a mistake on this given day as Runway 10L/R is not our normal runways for departure and taxi out is different that normal. My recommendation is to change the [Taxiway] B1 sign to add the directional arrow to show turn or to rename the 2nd half of the angle/jog of Taxiway B1 to emphasize the direction of taxi that Ground wants us to take.
Air Carrier Captain reported turning the wrong way to join a taxiway and cited confusing signage as a contributing factor.