A social media post asked Chichester residents if they had seen the 'Cucumber Man' driving around the city.
Chichester Sussex Facebook page asked: "Have you seen the mysterious Cucumber Man riding his marvellous machine on the lower Bognor road?"
Lavant resident, 36-year-old Alex Fryer, had been driving behind the 'Cucumber Man'.
Alex said: "I noticed this chap causing a bit of a tailback on the lower Bognor road this morning at about 8am. He seems to be driving a cucumber on wheels.
"I couldn't be sure if he is an eccentric character or a bit of a menace."
Under the post members of the public said that they had seen the driver but questioned the safety of the three-wheeled vehicle.