31-year-old Gareth Mills from Shaftesbury admitted December's attack in Ringwood Road in Alderholt.
Tributes To Girl Killed In Crash
Tributes are being paid to a 16-year-old girl killed on the A31 near RIngwood.
Jade Clark - who used to go to Ringwood School - died after coming off a scooter on Sunday evening.
Headteacher Miss Chris Edwards said: "Jade left Ringwood School in July 2012 to follow her love of hairdressing by starting a College course. She had a lively, bubbly personality and was always full of life. She will be remembered as someone who had a “huge heart”, always willing to help others in difficulty – a really positive force for good.
"Jade was always grateful for everything life had to offer. She wanted to improve herself, and refused to let things hold her back. She dropped in to see us on regular basis to let us know how she was getting on, and to thank people for their help and support.
"It was a real joy to see the progress she had made, an independent, confident young woman enjoying life to the full.
"Our thoughts and best wishes go to her family and friends at this difficult time."
Police have told Heart a red scooter was involved in a crash just before the Ashley Heath Roundabout near Ringwood on Sunday evening shortly before 8.30pm.
Road closures were put in place on the A31 in the area - part of the M27 westbound also had to be shut after Junction 2 for Romsey and Junction 1 the Cadman turn off.
It caused huge rush hour delays on Monday morning - Police have apologised but thanked drivers for their patience.
Anyone with information about the crash is asked to contact Dorset Police on the 101 number.
The 18-year-old woman couldn't remember what happened in Damerham High Street - near Fordingbridge.
The two cases happened in the early hours Cambridge Road and Burnaby Road.
Lewis Hine - who has a brain tumour - posted an inspirational film about his life, on his 16th birthday last week.
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