A man has been fined £720 for driving too slowly as he tried to join a motorway while using his mobile phone.
A court heard Grzegorz Sieradzki veered on and off the road at low speed while talking to a friend.
He was unaware his erratic driving had caught the attention of police officers in an unmarked car.
The 29-year-old admitted driving carelessly in Perth and on the M90 while using a phone on 25 July last year.
Depute fiscal John Adams told Perth Sheriff Court: "He entered the slip road on to the M90 excessively slowly and was seen using a mobile phone.
"He was seen to veer off the carriageway when there were no obstructions or hazards.
"The officers had seen enough so they activated their blue lights and pulled him over."
Sieradzki, who was driving his own car at the time, told the court he could lose his job as a forklift driver in Dunfermline if he was banned from driving.
Solicitor Billy Somerville, defending, said: "There was no real need to take the call.
"It was from a friend and he pressed the button and foolishly tried to do two things at once."
Sheriff William Wood said: "Clearly this was a very difficult and potentially dangerous set of circumstances. You were clearly distracted from your principal duty of driving your car safely."
He also imposed eight penalty points.