Street racers caught on camera by police cameras
2 November 2012 Last updated at 10:07 GMT
Illegal car racing on public roads will eventually lead to fatalities, according to police in Birmingham.
'Street racing', where hundreds of drivers use A-roads as unofficial race tracks, is a problem in a number of areas across the UK.
West Midlands Police have covertly filmed street races as part of a crackdown on the problem and gave the BBC exclusive access to the footage.
Jenny Hill reports.