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• W2075982848 abstract "Study ObjectivesOur study seeks to determine if light emitting diode (LED) billboards lead to an increase in the number of motor vehicle traffic collisions.MethodsWe evaluated crashes within a 1000 ft radius of 39 LED billboards in Los Angeles before and after billboard implementation, as well as collisions outside of this radius on the same street. From the Los Angeles Department of Building and Safety we obtained the locations and date of finalization of the 39 LED billboards in Los Angeles from May 31, 2007 through June 17, 2008. Through direct field observation of random locations, we selected a radius of 1000 ft as a standard for driver “distractibility” for all billboards. Collision data was obtained from the Statewide Integrated Traffic Record System of the California Highway Patrol and geocoded. We compared collisions in the year before May 31, 2007 to those in the year after June 17, 2008. We calculated risk ratios and confidence limits, assuming a Poisson distribution.ResultsNinety-eight percent of crashes on the 33 streets with billboards were geocoded. In the pre-LED period (5/31/06-5/30/07) there were 600 crashes within 1000 ft and 7247 crashes on the 33 streets. In the post-LED period (6/18/08-06/17/09), there were 596 crashes within 1000 ft and 6642 crashes on the 33 streets. The risk ratio comparing crashes near the billboards, controlling for crashes on the 33 streets, was 1.08 (95%CI 0.97-1.21). If this increase was due to the billboards, there were 50 excess crashes, or 1.4 crashes per billboard.ConclusionThere was a trend towards an increased ratio of crashes within the distractible geographic area, which may put drivers at increased risk around the billboards. But the absolute number of crashes decreased after LED billboard implementation, perhaps due to changes in traffic volume. Future research should consider the direction the billboard faces and the direction of traffic flow. Study ObjectivesOur study seeks to determine if light emitting diode (LED) billboards lead to an increase in the number of motor vehicle traffic collisions. Our study seeks to determine if light emitting diode (LED) billboards lead to an increase in the number of motor vehicle traffic collisions. MethodsWe evaluated crashes within a 1000 ft radius of 39 LED billboards in Los Angeles before and after billboard implementation, as well as collisions outside of this radius on the same street. From the Los Angeles Department of Building and Safety we obtained the locations and date of finalization of the 39 LED billboards in Los Angeles from May 31, 2007 through June 17, 2008. Through direct field observation of random locations, we selected a radius of 1000 ft as a standard for driver “distractibility” for all billboards. Collision data was obtained from the Statewide Integrated Traffic Record System of the California Highway Patrol and geocoded. We compared collisions in the year before May 31, 2007 to those in the year after June 17, 2008. We calculated risk ratios and confidence limits, assuming a Poisson distribution. We evaluated crashes within a 1000 ft radius of 39 LED billboards in Los Angeles before and after billboard implementation, as well as collisions outside of this radius on the same street. From the Los Angeles Department of Building and Safety we obtained the locations and date of finalization of the 39 LED billboards in Los Angeles from May 31, 2007 through June 17, 2008. Through direct field observation of random locations, we selected a radius of 1000 ft as a standard for driver “distractibility” for all billboards. Collision data was obtained from the Statewide Integrated Traffic Record System of the California Highway Patrol and geocoded. We compared collisions in the year before May 31, 2007 to those in the year after June 17, 2008. We calculated risk ratios and confidence limits, assuming a Poisson distribution. ResultsNinety-eight percent of crashes on the 33 streets with billboards were geocoded. In the pre-LED period (5/31/06-5/30/07) there were 600 crashes within 1000 ft and 7247 crashes on the 33 streets. In the post-LED period (6/18/08-06/17/09), there were 596 crashes within 1000 ft and 6642 crashes on the 33 streets. The risk ratio comparing crashes near the billboards, controlling for crashes on the 33 streets, was 1.08 (95%CI 0.97-1.21). If this increase was due to the billboards, there were 50 excess crashes, or 1.4 crashes per billboard. Ninety-eight percent of crashes on the 33 streets with billboards were geocoded. In the pre-LED period (5/31/06-5/30/07) there were 600 crashes within 1000 ft and 7247 crashes on the 33 streets. In the post-LED period (6/18/08-06/17/09), there were 596 crashes within 1000 ft and 6642 crashes on the 33 streets. The risk ratio comparing crashes near the billboards, controlling for crashes on the 33 streets, was 1.08 (95%CI 0.97-1.21). If this increase was due to the billboards, there were 50 excess crashes, or 1.4 crashes per billboard. ConclusionThere was a trend towards an increased ratio of crashes within the distractible geographic area, which may put drivers at increased risk around the billboards. But the absolute number of crashes decreased after LED billboard implementation, perhaps due to changes in traffic volume. Future research should consider the direction the billboard faces and the direction of traffic flow. There was a trend towards an increased ratio of crashes within the distractible geographic area, which may put drivers at increased risk around the billboards. But the absolute number of crashes decreased after LED billboard implementation, perhaps due to changes in traffic volume. Future research should consider the direction the billboard faces and the direction of traffic flow." @default.
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• W2075982848 date "2011-10-01" @default.
• W2075982848 modified "2023-09-26" @default.
• W2075982848 title "424 Motor Vehicle Collision in Relation to the Proximity of Electronic Billboard in a Large Urban Setting" @default.
• W2075982848 doi "https://doi.org/10.1016/j.annemergmed.2011.06.458" @default.
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