Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 17; Flight Crew Total 304
Communication Breakdown
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Object; Ground Event / Encounter Vehicle
Flight Crew Took Evasive Action
Procedure; Human Factors; Environment - Non Weather Related
I was taxiing from the parking area to the active runway via the Taxiway at 39N [Princeton Airport]. Active was Runway 28. I noticed a car parked on the grass along the runway behind the PAPI lights. As I taxied down I noticed a person runway along the runway with orange cones on the runway. As I taxied down I noticed a white sports like 'race car' approaching me on the taxiway. They veered into the grass as I taxied down and I have to veer steer my aircraft to the right of the taxiway to avoid them passing underneath my wing. As I approached the run up area I noticed two cars; various tripods with equipment and one of the cars was behind the threshold in grass of the active runway with two people outside the car. I stopped at the runway hold short lines; and had to shut down as they weren't moving. I got out of plane and had to explain to them that they have cars; equipment and cones on an active runway. The person said he worked there and had permission from his boss to be there. I had to state repeatedly that I cannot take the runway safely with people; cars; and equipment on the active runway; which they didn't seem to understand. I reviewed showed them the runway hold short lines and reviewed that anything on the runway side of these lines has to be moved. I asked what they would do about an approaching aircraft; he indicated he had a radio- but this airport doesn't technically require radio use to land there. I reviewed what they are doing is dangerous. After they cleared their cars; equipment; cones; and people I was able to start back up and obtain my departure clearance and depart uneventfully. The field was NOT NOTAM'ed closed for race car activity in my briefings. Monitoring CTAF during my previous landing; parking; then later restarting and taxiing did not indicate any of this activity.I should have notified NY Approach Controllers after establishing contact with them but I didn't. The Controller was very busy but it was my mistake not to notify them in hindsight.
Pilot reported airport was being used for car racing without NOTAMs being posted.