abstract: Driving the message home: black cabs half painted as ambulances have hit the streets in Birmingham, Liverpool, London and Manchester as part of the government's latest Know Your Limits safer drinking publicity campaign. The taxis form part of a wider advertising effort that also includes a fleet of 1,000 buses emblazoned with a bus route style map. Using the same 'Don't let a good night turn into a bad one' strapline, the journey depicted on the side of the buses terminates at an A&E department. Home Office minister Vernon Coaker (pictured) said: 'At this time of year when people will be out having a good time, these vehicles will, I hope, make people think twice about having one drink too many'.