It might seem only right and proper that we should be able to park outside our own homes, but the law doesn't agree. Reserving a space on a public highway, using the likes of cones and wheelie bins, is an offence and could land you in bother. What's the penalty: Obstructing public roads is an offence under the Highways Act and offenders can be issued with a Fixed Penalty Notice of £100. As with many such offences, how likely you are to receive a penalty depends on your local authority. Regardless of location, persistent offenders who illegally block off parking should expect a fine.