People who hog the middle lane on motorways or tailgate other drivers could be fined £100 if they are spotted by police.
Until now this type of careless driving has gone unpunished because it is difficult to take the cases to court. The authorities hope that on the spot penalties will be enough to encourage motorists to drive more considerately. Kate Bunkall has been looking at the problem.
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Sunday evening's weather update for the east
Sunday evening's weather update for the west
The 22 year old man is seriously injured in hospital. Police believe a baseball bat and iron bar may have been used in the attack