• Low speed autonomous emergency braking technology led to a 38% reduction in real-world rear-end crashes.
  • There was no significant difference between urban and rural crash benefits.
  • Meta-analysis was an effective method for combining data from various countries.
  • low speed autonomous emergency braking technology needs widespread fitment for maximum benefits.


This study set out to evaluate the effectiveness of low speed autonomous emergency braking (AEB) technology in current model passenger vehicles, based on real-world crash experience. The validating vehicle safety through meta-analysis (VVSMA) group comprising a collaboration of government, industry consumer organisations and researchers, pooled data from a number of countries using a standard analysis format and the established MUND approach. Induced exposure methods were adopted to control for any extraneous effects. The findings showed a 38 percent overall reduction in rear-end crashes for vehicles fitted with low speed autonomous emergency braking compared to a comparison sample of similar vehicles. There was no statistical evidence of any difference in effect between urban (≤60 km/h) and rural (>60 km/h) speed zones. Areas requiring further research were identified and widespread fitment through the vehicle fleet is recommended.