The Effects of Daylight Saving Time on Vehicle Crashes in Minnesota

Journal of Safety Research, Vol. 41, pp. 513-520, 2010

8 Pages Posted: 7 Jan 2011 Last revised: 22 Jan 2011

Arthur Huang

University of Minnesota - Twin Cities

David Matthew Levinson

affiliation not provided to SSRN

Date Written: November 25, 2010

Abstract

Introduction: Daylight saving time (DST), implemented as an energy saving policy, impacts many other aspects of life; one is road safety. Based on vehicle crash data in Minnesota from 2001 to 2007, this paper evaluates long- and short-term effects of DST on daily vehicle crashes. Method: To provide evidence to explain the causes of more/fewer crashes in DST, we examine the impact of DST on crashes in four periods of a day: 3 a.m.-9 a.m., 9 a.m.-3 p.m., 3 p.m.-9 p.m., 9 p.m.-midnight. The effects of risk and exposure to traffic are also separated. Our statistical models not only include weather conditions and dummy variables for days in DST as independent variables, but also consider traffic volumes on major roads in different periods of a day. Our major finding is that the short-term effect of DST on crashes on the morning of the first DST is not statistically significant. Moreover, it is interesting to notice that while DST per se is associated with fewer crashes during dusk, this is in part offset because it is also associated with more traffic on roads (and hence more crashes). Our path analysis shows that overall DST reduces crashes. Impact on industry: Daylight saving time can lead to fewer crashes on roads by providing better visibility for drivers.

Keywords: Daylight Saving Time, Vehicle Crashes, Exposure, Traffic Volume

JEL Classification: R40, R41, J28

Suggested Citation

Huang, Arthur and Levinson, David Matthew, The Effects of Daylight Saving Time on Vehicle Crashes in Minnesota (November 25, 2010). Journal of Safety Research, Vol. 41, pp. 513-520, 2010. Available at SSRN: https://ssrn.com/abstract=1735477

Arthur Huang

University of Minnesota - Twin Cities ( email )

420 Delaware St. SE
Minneapolis, MN 55455
United States

David Matthew Levinson (Contact Author)

affiliation not provided to SSRN

Paper statistics

Downloads
22
Abstract Views
449