Cathy Brough, head at St Michael's on Wyre CE School, says there have been 'numerous' near misses involving children and parents - including one shocking incident in the last month where a child's scooter nearly ended up under the wheels of a lorry.
Mrs Brough has been consulting with highways authorities over various road safety suggestions, including double yellow lines outside the school, lowering the speed limit during school hours and better signs. But she says bringing back the crossing warden that they lost four years ago would be the single biggest improvement.
"It's a catch 22 situation - we have a walk to school programme and try to encourage more children to walk to school because of the health benefits. Parents are supportive of the principle, but because of the dangers many are reluctant to walk and so they come in cars, which only adds to the problem.
"There have been numerous incidents reported to me of difficulties crossing the road, lorries mounting pavements and cars going very quickly next to narrow pavements.
"The traffic does seem to be getting worse and it is very worrying.''
The potential for a fatal accident was graphically highlighted earlier this month when a three-year-old, who was accompanied by his mother, fell off a push-along scooter he was riding on the pavement close to the narrow bridge over the River Wyre, the scooter almost being crushed by a lorry which was then in collision with a following car.
And one parent described how he was walking his daughter to school at the end of September when a lorry mounted the pavement just yards in front of them to avoid an oncoming lorry.
He said: "It was very frightening and you can see why parents don't want to walk with their kids.
"We realise that the narrow roads are part of life in St Michaels but it seems to be getting worse, especially with the heavier wagons.
"If anything they seem to go faster over the bridge because they are higher up and can see what's on the other side.''
A spokesperson for Lancashire County Council confirmed they were in discussions with the school about various safety improvement options, and added: "We did carry out two separate surveys in 2005 and on those occasions the school did not meet the criteria to provide a school crossing patrol, but we are happy to speak with the headteacher and to look again at the site if she feels the situation has changed.''