A motorcyclist knocked off his machine at a Wrexham roundabout suffered 21 fractures and was in hospital for nine days.
The driver of a car also involved in the collision admitted careless driving and said she had pulled out without seeing the motorcyclist.
Theresa Malone, a single parent of The Close in Hawarden, was fined £200 with £200 costs and a £30 surcharge.
Five penalty points were placed on her licence at Flintshire Magistrates’ Court at Mold.
District Judge Gwyn Jones said it was a case where Malone, 51, had paid insufficient attention to the road conditions and did not see the motorcyclist approach from her right.
Prosecutor Rhian Jackson said the collision occurred on August 1 last year when Malone was driving a Ford Focus from the direction of Wrexham Maelor Hospital to the B&Q on Mold Road roundabout.
It was her intention to pull out across three lanes to turn right, but she did so in a front of a motorcycle ridden by Nigel Malcolm Guest.
He swerved away from her, but she continued towards him and drove into his side, knocking the motorbike on top of him. She told how she had not seen or heard the motorbike before the collision.
The victim sustained multiple injuries and received surgery, with pins and plates put into his left arm and shoulder.
He had been in a lot of pain, suffered fractured ribs and he had sustained 32 fractures to his body.