The 14-year-old was airlifted to hospital but died of her injuries

Jennifer Koester, 14, was hit after she stepped off a bus in Faringdon, Oxfordshire, in January last year.

Marie Koester said a 20mph limit would stop "needless tragedies like the death of our daughter."

According to the charity Brake 12 children are killed or badly hurt in the South East every month.

'Indescribable suffering'

Mrs Koester says "Jenny's death was our worst nightmare come true.

"It caused indescribable suffering to our family and the pain never goes away.

"We are helping to launch Road Safety Week to convince Oxfordshire drivers to drive at 20mph or slower around schools and homes.

"If all drivers slowed down and paid more attention to what is going on around them, I am sure there would be fewer deaths on the roads."

According to a survey conducted by Brake, 43% of children aged between five and 14 have been hit or nearly hit while walking or cycling.