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E. Chukwudi Onwuachi-Saunders, MBBS, MPH; Deborah A. Lambert, RN, MPH; Polly A. Marchbanks, PhD; Patrick W. O'Carroll, MD, MPH; James A. Mercy, PhD

JAMA. 1989;262(16):2262-2264.

Abstract
During the summer of 1987, we investigated a series of firearm assaults occurring on Los Angeles County (California) roadways. Using law enforcement records, we identified 137 incidents of roadway assaults with firearms. Of these 137 incidents, 39% were brandishings and 61% were shootings. Of the shootings, 20% resulted in injuries; two were fatal. We compared the findings for June through August 1987 with findings for earlier years and found that the incidence rate of freeway firearm assault had increased each year from 1985 through 1987 for both freeway shootings and brandishings. We also found a positive association between freeway congestion and freeway firearm assaults in 1987.

(JAMA. 1989;262:2262-2264)

Author Affiliations
From the Intentional Injuries Section (Drs Onwuachi-Saunders, Marchbanks, O'Carroll, and Mercy) and Unintentional Injuries Section (Ms Lambert), Epidemiology Branch, Division of Injury Epidemiology and Control, Center for Environmental Health and Injury Control, Centers for Disease Control, Atlanta, Ga.

Footnotes
Reprint requests to Centers for Disease Control, Division of Injury Epidemiology and Control (F36), 1600 Clifton Rd, Atlanta, GA 30333 (Dr Onwuachi-Saunders).

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