Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 50
Distraction; Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Ramp; Ground Incursion Taxiway
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Became Reoriented; Flight Crew Overcame Equipment Problem; General Flight Cancelled / Delayed
Airport; Environment - Non Weather Related; Human Factors
Due to construction in the southeast portion of the airport; I did not enter the ramp for [the] gate at the correct entry point.  Even though I thought I was intimately aware of the LGA environs; my expectation bias; compounded with non-standard taxi marking that made it appear that I was at the end of the taxiway; caused me to make a mistake.  The irony of this event is when we departed Runway 31 earlier; both of us noted the crazy construction and the potential for mistakes that could happen in the close quarters.  Prior to operating out of LGA for the first time in a long time; I reviewed the company notes/memos and our 10-7 pages.  Both of us had our taxi charts up.  When I noticed we were in the wrong position; I stopped the aircraft.  We coordinated with the Ramp Control and was safely marshaled out after we restarted our left engine.  Causes included expectation bias; poor taxiway markings; construction congestion. This was in daylight. Experienced crew.  While I take responsibility; better markings would have made the difference; especially since we are all not at the top of our game with the reduced flights.  Even though taxi configurations change during construction; this does not alleviate reasonable signage or markings.  It is the cost of doing the work.  I am sorry for the mistake.  However; if this is the worst thing I do----it has been a good career.  For me; it illustrated that I can always do better.
Taxied down wrong alley in LGA.Cause - Taxied down wrong alley in LGA; expectation bias combined with new construction and unfamiliar with temporary entry points.Suggestions - Just try to stay current with the extensive and dynamic new construction at LGA.
Air carrier flight crew reported a ramp and taxiway incursion during arrival due to airport construction at LGA airport and subsequent temporary routing.