M-20 F Executive 21
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 41; Flight Crew Total 389; Flight Crew Type 389
Communication Breakdown
Conflict Ground Conflict; Critical; Ground Event / Encounter Other / Unknown
Flight Crew Took Evasive Action
Airport; Human Factors
I completed a run-up at departure end penalty box and observed an airport vehicle depart the same place. As I was preparing to taxi; a jet called my aircraft identifying by location to request my intentions. I stated 'run up complete but he can start a back taxi.'  I started the taxi to the active runway. He declined in favor of my departure. I called 'taxi and departure Runway X; VFR to the east.' I rolled on to the runway displaced threshold while checking for traffic on final. I observed the jet had not moved but he called and requested if anyone else was inbound to land; to no response. I checked the plane was secured; and after rolling some of the displaced threshold; checked instruments and passengers; and applied full power. After reaching rotation speed; I observed the airport vehicle cross the runway in front of me. It appeared he was playing chicken. I considered rejecting the takeoff but could not be certain the power changes and braking would help avoid the collision. Thankfully the vehicle cleared the runway and I was off the ground moments later.  I think safety can be improved by having ground vehicles at uncontrolled airports stating their intentions. A simple call of 'crossing the active runway' would have improved safety as I could check and delay my takeoff. I called on CTAF during departure that the ground vehicles crossing was 'not good' and another voice agreed. I met the driver later and he was the voice that replied. As pilot in command; I will improve by maintaining situational awareness of aircraft and NORDO ground vehicles. It was a busy time with other traffic and that is a good reminder to double check your aircraft and intended path.
Mooney 20F pilot reported a ground conflict with a vehicle at an non-towered airport.  Reporter suggested airport vehicles should also state their intentions at uncontrolled fields.