Drink driving and speeding in Sao Paulo, Brazil

Empirical cross-sectional study (2015-2018)

Gabriel Andreuccetti, Vilma Leyton, Heráclito Barbosa Carvalho, Daniele M. Sinagawa, Henrique S. Bombana, Julio C. Ponce, Katharine Allen, Andres I. Vecino-Ortiz, Adnan A. Hyder

Research output: Contribution to journalArticle

Abstract

Objectives To evaluate the prevalence of drink driving and speeding during 2015-2018 in Sao Paulo, Brazil. Design Cross-sectional observational study. Setting Roads representing the five main regions of the city of Sao Paulo in Brazil, one of the world's largest urban areas. Participants Drivers (N=10 294) stopped at routine roadside breath testing checkpoints and those driving in selected roads for speeding measurement (N=414 664). Primary and secondary outcome measures Microwave radar guns were used to measure the speed of vehicles, while the prevalence of drivers under the influence of alcohol was observed in police checkpoints. Data were collected during three consecutive years (2016-2018) following a baseline study established in 2015 using a city-level representative sample of observational data representing all days of the week. Results Alcohol-related fatalities kept at a constantly high percentage, with 39% of road traffic deaths involving alcohol in 2016. Drivers testing above the legal breath alcohol concentration limit showed a decreasing trend, from 4.1% (95% CI 2.9% to 5.5%) at baseline to 0.6% (95% CI 0.2% to 1.2%) in the end of 2018 (p<0.001); however, more than half of drivers refused breath tests at checkpoints despite steep legal penalties. The prevalence of speeding among all vehicles decreased from 8.1% (95% CI 7.9% to 8.2%) to 4.9% (95% CI 4.7% to 5.1%) by the end of 2016 (p<0.001), but then increased again to 13.5% (95% CI 13.2% to 13.9%) at the end of the study period (p<0.001). Conclusions Drink driving rates have reduced, likely due to an increase in drivers refusing breath alcohol tests, while speeding rates have increased significantly by the end of the study period, particularly among motorcycles. Future strategies aiming at reducing road traffic injuries in the major Brazilian city should tailor drink driving and speeding enforcement based on the new evidence provided here.

Original languageEnglish (US)
Article numbere030294
JournalBMJ open
Volume9
Issue number8
DOIs
StatePublished - Aug 1 2019

Fingerprint

Brazil
Cross-Sectional Studies
Alcohols
Breath Tests
Radar
Motorcycles
Firearms
Police
Microwaves
Observational Studies
Outcome Assessment (Health Care)
Wounds and Injuries

Keywords

  • alcohol
  • drink driving
  • injuries
  • road safety
  • speed

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Andreuccetti, G., Leyton, V., Carvalho, H. B., Sinagawa, D. M., Bombana, H. S., Ponce, J. C., ... Hyder, A. A. (2019). Drink driving and speeding in Sao Paulo, Brazil: Empirical cross-sectional study (2015-2018). BMJ open, 9(8), [e030294]. https://doi.org/10.1136/bmjopen-2019-030294

Drink driving and speeding in Sao Paulo, Brazil : Empirical cross-sectional study (2015-2018). / Andreuccetti, Gabriel; Leyton, Vilma; Carvalho, Heráclito Barbosa; Sinagawa, Daniele M.; Bombana, Henrique S.; Ponce, Julio C.; Allen, Katharine; Vecino-Ortiz, Andres I.; Hyder, Adnan A.

In: BMJ open, Vol. 9, No. 8, e030294, 01.08.2019.

Research output: Contribution to journalArticle

Andreuccetti, G, Leyton, V, Carvalho, HB, Sinagawa, DM, Bombana, HS, Ponce, JC, Allen, K, Vecino-Ortiz, AI & Hyder, AA 2019, 'Drink driving and speeding in Sao Paulo, Brazil: Empirical cross-sectional study (2015-2018)', BMJ open, vol. 9, no. 8, e030294. https://doi.org/10.1136/bmjopen-2019-030294
Andreuccetti G, Leyton V, Carvalho HB, Sinagawa DM, Bombana HS, Ponce JC et al. Drink driving and speeding in Sao Paulo, Brazil: Empirical cross-sectional study (2015-2018). BMJ open. 2019 Aug 1;9(8). e030294. https://doi.org/10.1136/bmjopen-2019-030294
Andreuccetti, Gabriel ; Leyton, Vilma ; Carvalho, Heráclito Barbosa ; Sinagawa, Daniele M. ; Bombana, Henrique S. ; Ponce, Julio C. ; Allen, Katharine ; Vecino-Ortiz, Andres I. ; Hyder, Adnan A. / Drink driving and speeding in Sao Paulo, Brazil : Empirical cross-sectional study (2015-2018). In: BMJ open. 2019 ; Vol. 9, No. 8.
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abstract = "Objectives To evaluate the prevalence of drink driving and speeding during 2015-2018 in Sao Paulo, Brazil. Design Cross-sectional observational study. Setting Roads representing the five main regions of the city of Sao Paulo in Brazil, one of the world's largest urban areas. Participants Drivers (N=10 294) stopped at routine roadside breath testing checkpoints and those driving in selected roads for speeding measurement (N=414 664). Primary and secondary outcome measures Microwave radar guns were used to measure the speed of vehicles, while the prevalence of drivers under the influence of alcohol was observed in police checkpoints. Data were collected during three consecutive years (2016-2018) following a baseline study established in 2015 using a city-level representative sample of observational data representing all days of the week. Results Alcohol-related fatalities kept at a constantly high percentage, with 39{\%} of road traffic deaths involving alcohol in 2016. Drivers testing above the legal breath alcohol concentration limit showed a decreasing trend, from 4.1{\%} (95{\%} CI 2.9{\%} to 5.5{\%}) at baseline to 0.6{\%} (95{\%} CI 0.2{\%} to 1.2{\%}) in the end of 2018 (p<0.001); however, more than half of drivers refused breath tests at checkpoints despite steep legal penalties. The prevalence of speeding among all vehicles decreased from 8.1{\%} (95{\%} CI 7.9{\%} to 8.2{\%}) to 4.9{\%} (95{\%} CI 4.7{\%} to 5.1{\%}) by the end of 2016 (p<0.001), but then increased again to 13.5{\%} (95{\%} CI 13.2{\%} to 13.9{\%}) at the end of the study period (p<0.001). Conclusions Drink driving rates have reduced, likely due to an increase in drivers refusing breath alcohol tests, while speeding rates have increased significantly by the end of the study period, particularly among motorcycles. Future strategies aiming at reducing road traffic injuries in the major Brazilian city should tailor drink driving and speeding enforcement based on the new evidence provided here.",
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N2 - Objectives To evaluate the prevalence of drink driving and speeding during 2015-2018 in Sao Paulo, Brazil. Design Cross-sectional observational study. Setting Roads representing the five main regions of the city of Sao Paulo in Brazil, one of the world's largest urban areas. Participants Drivers (N=10 294) stopped at routine roadside breath testing checkpoints and those driving in selected roads for speeding measurement (N=414 664). Primary and secondary outcome measures Microwave radar guns were used to measure the speed of vehicles, while the prevalence of drivers under the influence of alcohol was observed in police checkpoints. Data were collected during three consecutive years (2016-2018) following a baseline study established in 2015 using a city-level representative sample of observational data representing all days of the week. Results Alcohol-related fatalities kept at a constantly high percentage, with 39% of road traffic deaths involving alcohol in 2016. Drivers testing above the legal breath alcohol concentration limit showed a decreasing trend, from 4.1% (95% CI 2.9% to 5.5%) at baseline to 0.6% (95% CI 0.2% to 1.2%) in the end of 2018 (p<0.001); however, more than half of drivers refused breath tests at checkpoints despite steep legal penalties. The prevalence of speeding among all vehicles decreased from 8.1% (95% CI 7.9% to 8.2%) to 4.9% (95% CI 4.7% to 5.1%) by the end of 2016 (p<0.001), but then increased again to 13.5% (95% CI 13.2% to 13.9%) at the end of the study period (p<0.001). Conclusions Drink driving rates have reduced, likely due to an increase in drivers refusing breath alcohol tests, while speeding rates have increased significantly by the end of the study period, particularly among motorcycles. Future strategies aiming at reducing road traffic injuries in the major Brazilian city should tailor drink driving and speeding enforcement based on the new evidence provided here.

AB - Objectives To evaluate the prevalence of drink driving and speeding during 2015-2018 in Sao Paulo, Brazil. Design Cross-sectional observational study. Setting Roads representing the five main regions of the city of Sao Paulo in Brazil, one of the world's largest urban areas. Participants Drivers (N=10 294) stopped at routine roadside breath testing checkpoints and those driving in selected roads for speeding measurement (N=414 664). Primary and secondary outcome measures Microwave radar guns were used to measure the speed of vehicles, while the prevalence of drivers under the influence of alcohol was observed in police checkpoints. Data were collected during three consecutive years (2016-2018) following a baseline study established in 2015 using a city-level representative sample of observational data representing all days of the week. Results Alcohol-related fatalities kept at a constantly high percentage, with 39% of road traffic deaths involving alcohol in 2016. Drivers testing above the legal breath alcohol concentration limit showed a decreasing trend, from 4.1% (95% CI 2.9% to 5.5%) at baseline to 0.6% (95% CI 0.2% to 1.2%) in the end of 2018 (p<0.001); however, more than half of drivers refused breath tests at checkpoints despite steep legal penalties. The prevalence of speeding among all vehicles decreased from 8.1% (95% CI 7.9% to 8.2%) to 4.9% (95% CI 4.7% to 5.1%) by the end of 2016 (p<0.001), but then increased again to 13.5% (95% CI 13.2% to 13.9%) at the end of the study period (p<0.001). Conclusions Drink driving rates have reduced, likely due to an increase in drivers refusing breath alcohol tests, while speeding rates have increased significantly by the end of the study period, particularly among motorcycles. Future strategies aiming at reducing road traffic injuries in the major Brazilian city should tailor drink driving and speeding enforcement based on the new evidence provided here.

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