London - Mayor Boris Johnson is the equivalent of a Police and Crime Commissioner for London. To ask him to prioritise road safety email him at firstname.lastname@example.org  or tweet him @MayorofLondon
Scotland - Policing in Scotland is a devolved matter, with a different procedure and no Police and Crime Commissioner. However, there is now a single force, Police Scotland. Contact your MSP to ask for a greater priority to be given to roads policing. A separate report into Road Justice in Scotland will be published in 2014.
Northern Ireland - The governance over the Police Service of Northern Ireland has been devolved to the Northern Ireland Assembly. Please contact your MLA to ask for stronger enforcement of road traffic law in Northern Ireland.