Jennifer Duncombe, who has two children at St Michael's CofE Primary, is spearheading a battle to make Crowthorne Road, outside the school, safer for youngsters and adults to cross during the morning and afternoon school-run.
The petition has attracted about 70 signatures from concerned parents in just two weeks.
Miss Duncombe, from Easthampstead, said: "My girls have been going to St Michael's for two years and in that time I've seen such a decline in the standard of driving on that road.
"They [motorists] ignore the zebra crossing all the time and sometimes cars just won't stop.
"The worst thing, more recently, is that cars are driving across the crossing when we're not clear of it."
To sign the petition, visit http://democratic.bracknell-forest.gov.uk/mgEPetitionDisplay.aspx?ID=22&RPID=9091997&%24LO%24=1
Miss Duncombe said that in recent weeks her friend's son was almost hit by a car when using the crossing - but
fortunately got grabbed out of the way at the last second. She is worried about the safety of her twin daughters, Charlotte and Amelia, aged six.
"It's terrifying. Because we see it all the time we're quite nervous," said the 40-year-old.
"We genuinely believe
somebody is going to be knocked down before too long."
She and other like-minded mums and dads argue the speed bumps along Crowthorne Road, and the zebra crossing outside the school, "aren't effective" and are calling for traffic lights to be installed instead.
"Motorists are less inclined to drive through a red light then not stop at a zebra crossing," Miss Duncombe explained. "The cars just come too fast."
She added: "It would be nice to see more signs saying 'school ahead' before and after the crossing as well. The council has got to do something."
According to the parents, seeing cars speeding and ignoring the crossing is a common occurrence.
Miss Duncombe said anyone who feels their children are vulnerable should sign the petition.
"Children need to be protected on our crossings," she said. Families are also calling for a fixed 20mph speed limit to be enforced along Crowthorne Road, rather than an advisory limit.
Bracknell Forest Council spokeswoman Alana Razzell said: "We are aware that a petition is on-going regarding the crossing outside St Michael's CofE Primary School. The petition runs until May 1 and will give it careful consideration once the petition has closed."