"We will park all over the place and block people's driveways if necessary, because this has to be sorted before a child gets killed."
Carol McKenzie-Rex, Clevedon School board chairwoman, said primary-aged kids had used the bus for Papakura High for many years. That service was stopped as few secondary students used it.
She said Murphy Buses had quoted a weekly figure of $620 - or $3 a head per return trip - to extend the new service with a short trip into Kawakawa Bay.
"Some people have three children and that is an extra $45 a week to find," she said. "A lot of people can't afford it.
"The Ministry of Education won't even consider moving their new bus stop a few hundred metres along the road to a safer spot."
The Ministry said it advised parents last September of the changes, caused by schools pulling out of a shared transport network. "Kawakawa students attending Clevedon School are not attending their closest school, so they are ineligible for Ministry-funded transport assistance," a spokesman said.
Murphy Buses' Auckland boss Ian Greenslade declined to comment.