Up to 16,500 motoring offences were detected by police patrolling some of Northamptonshire's most dangerous roads over the past six years. A total of 2,300 drivers were arrested on the so-called Red Routes, for offences including drink-driving, dangerous driving and speeding.
Police hope law enforcement and education will improve road safety.
A Red Route is designated when there have been four or more serious accidents on a road over three years.
The highest number of accidents took place on a stretch of the A43 between Kettering and Northampton.
The Red Routes system was introduced by the county's Casualty Reduction Partnership in June 2000.
There are currently 48 Red Routes in the county.