A group of school students from St Mary's College in Auckland had a lucky escape today after the bus they were on crashed through the rails of a motorway overbridge. The bus was left dangling precariously but everyone got off the bus safely and there were no serious injuries. Last year Philippa Cameron from Otematata Station in the Waitaki Valley, presented a petition to parliament calling on the Government to make it mandatory for school buses to have seat belts - but nothing came of it. She joined Karyn to talk about it.