A zero tolerance alcohol restriction law was adopted in Brazil in 2008. The effectiveness of this intervention was assessed by comparing traffic related mortality in two time periods 1980-2007 and 2008-2013. Data on mortality and population was gathered from Brazilian Ministry of Health information systems and regression analyses were carried out separately for 3 major Brazilian capitals: Belo Horizonte, Rio de Janeiro and São Paulo.
In two cities (Belo Horizonte and Rio de Janeiro) there were no significant changes in mortality rate trends in two periods, 1980 to 2007 and 2008 to 2013, where the observed rates did not differ significantly from predicted rates. In São Paulo, there was a decreasing trend until 2007, but unexpectedly there were higher levels after the implementation of the law. The authors conclude that there is no evidence of reduced traffic-related mortality in the three major Brazilian capitals 5.5 years after the zero-tolerance drinking and driving law was adopted.
Source: Evaluating the Brazilian zero-tolerance drinking and driving law: time series analyses of traffic-related mortality in three major cities Volpe FM; Ladeira RM; Fantoni R. Traffic Injury Prevention vol 18, No 4, 2017, pp337-343.