The safety value of guardrails and crash cushions: a meta-analysis of evidence from evaluation studies.

@article{Elvik1995TheSV,
  title={The safety value of guardrails and crash cushions: a meta-analysis of evidence from evaluation studies.},
  author={Rune Elvik},
  journal={Accident; analysis and prevention},
  year={1995},
  volume={27 4},
  pages={523-49}
}
  • Rune Elvik
  • Published 1995 in Accident; analysis and prevention
Evidence from 32 studies that have evaluated the safety effects of median barriers, guardrails along the edge of the road, and crash cushions (impact attenuators) is summarized by means of a meta-analysis. Two hundred and thirty-two (232) estimates of safety effects are included in the meta-analysis. The presence of publication bias is tested by means of the funnel graph method. For most subsets of the data, no evidence of publication bias is found. Weighted mean estimates of safety effects are… CONTINUE READING