deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index c504aad..8cc0973 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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title = {{Safety effectiveness of converting signalized intersections to roundabouts}},  journal = {Accident Analysis \& Prevention},  }  @article{Persaud_2001,  author = {Persaud, Bhagwant N. and Retting, Richard A. and Garder, Per E. and Lord, Dominique },  title = {Observational Before-After Study of the Safety Effect of U.S. Roundabout Conversions Using the Empirical Bayes Method},  journal = {Transportation Research Record: Journal of the Transportation Research Board},  volume = {1751},  year = {2001}  }