The underpass at Marton Junction has provided a place for schoolchildren to safely cross the train tracks on the way to school for more than a century.
But neglect has left it littered with overgrown weeds, broken glass and rubbish, while dirt seeps through the walls that have been heavily tagged.
Fiona Reid hit Facebook to raise concerns about the poor state of the underpass last week and she has been inundated with support from the Marton Junction community and further afield.
"Our tamariki have to use it to get to school," she said. "We didn't have to put up with this when we were growing up."
She's asking KiwiRail, which owns the underpass, to come to the party and said it needed to take advice from the words on its own website, "Safety is paramount."