Speed cameras in different parts of the country have major variations in the way they assess our driving speeds, new research shows.
A study carried out at Oxford University has found that rapid drivers could take their set of wheels through a speed camera 15mph above areas where there should be a 30mph driving limit.
In one area, the senior researcher, Dan Neyland, found that staff shortages were causing partnerships only to take action against drivers travelling over 45mph in a 30mph zone.
Casual attitudes could also be found in fining speeding drivers, with only about 60 to 70 per cent enforcing the harsh penalties.
Not many road users are fans of speed cameras, but the fact that many speeders aren't brought to book could see drivers' attitudes soften.
In what could be a blessing for people who love driving in the fast lane, Mr Neyland said that the penalty system for speed cameras can be "complex and messy".
A spokesperson for the Department of Transport said the government had laid down "firm rules" on the issue of speed cameras.