Editing 420 (cannabis culture) (section)

===Traffic safety===

Despite two studies reporting a supposed increase in the risk of [[Traffic collision|fatal motor vehicle crashes]] on April 20,<ref>{{cite journal|last1=Staples|first1=John A.|last2=Redelmeier|first2=Donald A.|title=The April 20 Cannabis Celebration and Fatal Traffic Crashes in the United States|journal=[[JAMA Internal Medicine]]|date=2018|volume=178|issue=4|pages=569–572|doi=10.1001/jamainternmed.2017.8298|pmid=29435568|pmc=5876802| issn=2168-6106 }}</ref><ref>{{cite journal |last1=Vandoros |first1=Sotiris |last2=Kawachi |first2=Ichiro |title=The relative risk of motor vehicle collision on cannabis celebration day in Great Britain |journal=Accident Analysis & Prevention |date=July 2019 |volume=128 |pages=248–252 |doi=10.1016/j.aap.2019.02.013 |pmid=30902341 |s2cid=85457198 |url=https://kclpure.kcl.ac.uk/ws/files/107744781/420_accepted_version.pdf }}</ref> further investigation and analysis found the evidence did not support such claims.<ref>{{Cite journal|last1=Harper|first1=Sam|last2=Palayew|first2=Adam|date=2019-01-29|title=The annual cannabis holiday and fatal traffic crashes|journal=Injury Prevention|volume=25|issue=5|pages=433–437|language=en|doi=10.1136/injuryprev-2018-043068|pmid=30696698|s2cid=59413349|issn=1353-8047|url=http://osf.io/tzcsy/}}</ref><ref>{{cite journal |last1=Aydelotte |first1=Jayson D. |last2=Mardock |first2=Alexandra L. |last3=Teixeira |first3=Pedro G. |last4=Brown |first4=Lawrence H. |title=Re-examining the Association Between '4/20' and Fatal Crashes—Doobie-ous Data? |journal=JAMA Internal Medicine |date=1 November 2018 |volume=178 |issue=11 |pages=1565 |doi=10.1001/jamainternmed.2018.5856 |pmid=30398555 |s2cid=53223889 }}</ref><ref>{{cite journal |last1=Staples |first1=John A. |last2=Redelmeier |first2=Donald A. |title=Association Between April 20 Cannabis Celebration and Fatal Crashes |journal=JAMA Internal Medicine |date=1 March 2019 |volume=179 |issue=3 |pages=456 |doi=10.1001/jamainternmed.2018.8094 |pmid=30715145 |s2cid=73432259 }}</ref><ref>{{cite journal |last1=Staples |first1=John A |last2=Redelmeier |first2=Donald A |title=Crashes on cannabis celebration day |journal=Injury Prevention |date=October 2019 |volume=25 |issue=5 |pages=476–477 |doi=10.1136/injuryprev-2019-043262 |pmid=31302609 |s2cid=196618121 }}</ref>