They’re a cheaper and convenient alternative to driving a car, but some e-bike riders are causing massive headaches for other road users and police. A string of serious injuries and deaths in e-bike crashes, particularly involving children, is fuelling calls for a crackdown. Today, Geoff Rose from the Monash Institute of Transport Studies on the influx of illegal e-bikes on the roads.Featured: Geoff Rose, Adjunct Professor in Transport Engineering at Monash University