In major reviews  it has been concluded that enforcement targeted at a limited number of high risk violations is more effective in reducing road crashes than non-targeted general enforcement. There are various reasons:
- Organizational: Given the limited amount of manpower and equipment of police, the enforcement managers will always aim to get maximum value from scarce resources. Focusing on a limited number of high risk violations is more efficient than a non-focused general enforcement approach
- Road safety: Focusing on one or more high risk violations such as speeding, drink driving, seat belt use and red light running is also justifiable given the scientific evidence of the relationships between these violations and road safety risk;
- Communication: it is easier to communicate to road users about a limited and specific number of violations than about traffic violations in general.