Small Aircraft; Low Wing; 1 Eng; Retractable Gear
Flight Crew Flight Instructor; Flight Crew Commercial
Flight Crew Last 90 Days 215; Flight Crew Total 7205; Flight Crew Type 565
Communication Breakdown; Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Runway
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Airport; Human Factors
Landed and dropped off passenger. After getting ATIS code called Ground and got clearance to taxi. I thought the active runway was the one I had landed on before dropping off my passenger; but it had changed. I thought the Controller's instructions were to 'Taxi across the Runway to 23.' Instead he may have said 'taxi across Runway 23.' The Ground Controller told me I had taxied across the active runway. Not all the taxiways are labeled correctly.
A pilot misunderstood ATC instructions and taxied across an active FDK runway.