An impatient driver was jailed after crashing head on with one car and scraping the side of another as he pulled out to overtake.
Lee Whitworth's dangerous driving left one grandfather terrified and hampered a teacher's career due to the injuries they sustained.
His vehicle raked the side of one oncoming car and then hit the other head-on to end 90 seconds of driving on the A617, Nottingham Crown Court heard.
Whitworth was sent to prison for nine months and will begin a three-year driving ban when released. He had denied dangerous driving in April last year but was convicted by a jury.
Judge Rosalind Coe QC told him: "It was a matter of luck that nobody was seriously injured or even killed.
"You were clearly frustrated by the speed of the cars ahead. This was a busy road with a constant flow of traffic in both directions.
"At the time of the collision, you pulled out when it was clearly unsafe to do so."
He first struck a car being driven by a young teacher, who was still training. He suffered a broken foot and for months was nervous of driving or even being a passenger in a car.
His recovery reduced the amount of time he could spend in the classroom. which he needed to qualify. He added: "It affected pupils doing GCSEs because they didn't have access to their maths teacher. That caused complaints from parents."
The other victim was unable to give a full statement because of ill health.
Dawn Pritchard, prosecuting, told the court: "He said the first thing which went through his mind when the collision happened was that he could have had his three-year-old grandson with him.
"He said that it could have frightened him to death or worse," added Miss Pritchard.
Chris Brewin, mitigating, said Whitworth works with autistic children, including one-to-one sessions.
"It is something he is proud of and appears to have put distance between himself from offending," he said on behalf of Whitworth who lives in Ridgeway Terrace, Warsop.
"He is cycling to and from work. He leaves home at 6am and doesn't come back until 6.30pm," added Mr Brewin.
When the disqualification ends, Whitworth will have to take a tougher test to regain his driving licence.
