Date: 202108
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Weather elements / visibility: 10
Light: Daylight
Aircraft: B737 Undifferentiated or Other Model
Operator: Corporate
Flight plan: None
Mission: Training
Flight phase: Taxi
ATC / advisory: Ground ZZZ
Reporter organization: Corporate
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Human factors: Workload; Human-Machine Interface; Situational Awareness; Communication Breakdown; Confusion
Second reporter function: Pilot Flying; Captain
Anomaly: Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Runway
Detector: Person Flight Crew
When detected: Taxi
Result: Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Contributing factors: Procedure; Human Factors
Primary problem: Human Factors

Narrative: Cleared by ground to taxi to runway XY via taxiway 1 and taxiway 2; Hold short of taxiway 2. Approaching 2; cleared to cross [runway XY]. I read back clearance. Captain acknowledged and said 'cleared to taxi.' ATC was busy with additional traffic and an approaching thunderstorm. While referencing aerodrome chart I looked up from my airport chart to reference the runway designated sign to see that we were crossing runway XY with an aircraft conducting its takeoff roll; I called 'Go go go aircraft left' Departing aircraft was rotating and passed behind and 300+ feet above.We should have held until we both confirmed the appropriate taxi route; and verified correct route.Contributing factors: Captain unfamiliar [with] aerodrome. ATC workload; multiple commuter flights and firefighting aircraft. Approaching thunderstorm.Corrective actions: Improve CRM and aerodrome familiarity with expected taxi route verses cleared taxi route. Aircraft should not move until taxi route has been confirmed.


Second narrative: Taxi instructions were from [our present location] to RWY XY via left on taxiway 1; 3 to hold short of 2.  Instructions were read back by the CP (Check Pilot) and verified by CA (Captain). Upon reaching taxiway 2; ground control amended clearance to RWY XY via 2 and by clearing us to cross RWY XX. The CP read back the taxi instructions and the CA acknowledged. The CP pointed out another aircraft on 2 that was holding for us and the CA acknowledged. The CP proceeded to verify the amended taxi route on an EFB. The CA proceeded to cross 2 and RWY XX at 3. The CP went heads up to notice departing traffic on RWY XX and stated 'Go Go Go'.  Once clear of RWY XX the crew was notified by ground of a possible pilot deviation. Weather was CAVOK at the airport.Contributing factors were a takeoff brief being conducted at critical points on the taxi route and a large amount of traffic on the ground control frequency due to adverse weather in the area.      Preventive measures in the future are to minimize briefings while the aircraft is in motion; for the pilot taxiing the aircraft to ensure proper taxi clearance is understood by stating their intentions at trigger points along the taxi route and for the pilot not taxiing the aircraft to ensure the correct taxi route is being followed while query the pilot taxiing the aircraft if any deviations start to develop.


Synopsis: Flight crew reported a runway incursion caused by lack of communication between crew members and not confirming the taxi route.