title: Cities with camera-equipped taxicabs experience reduced taxicab driver homicide rates: United States, 1996-2010.
abstract: BACKGROUND
  Driving a taxicab remains one of the most dangerous occupations in the United States, with leading homicide rates. Although safety equipment designed to reduce robberies exists, it is not clear what effect it has on reducing taxicab driver homicides.
  
  
  RESULTS
  Taxicab driver homicide crime reports for 1996 through 2010 were collected from 20 of the largest cities (>200,000) in the United States: 7 cities with cameras installed in cabs, 6 cities with partitions installed, and 7 cities with neither cameras nor partitions. Poisson regression modeling using generalized estimating equations provided city taxicab driver homicide rates while accounting for serial correlation and clustering of data within cities. Two separate models were constructed to compare (1) cities with cameras installed in taxicabs versus cities with neither cameras nor partitions and (2) cities with partitions installed in taxicabs versus cities with neither cameras nor partitions. Cities with cameras installed in cabs experienced a significant reduction in homicides after cameras were installed (adjRR = 0.11, CL 0.06-0.24) and compared to cities with neither cameras nor partitions (adjRR = 0.32, CL 0.15-0.67). Cities with partitions installed in taxicabs experienced a reduction in homicides (adjRR = 0.78, CL 0.41-1.47) compared to cities with neither cameras nor partitions, but it was not statistically significant.
  
  
  CONCLUSIONS
  The findings suggest cameras installed in taxicabs are highly effective in reducing homicides among taxicab drivers. Although not statistically significant, the findings suggest partitions installed in taxicabs may be effective.
authors.affiliation: Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, MS 1811, Morgantown 26505, West Virginia.
authors.forename: Cammie Chaumont
authors.initials: CC
authors.lastname: Menéndez
authors.affiliation: Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, MS 1811, Morgantown 26505, West Virginia.
authors.forename: Harlan
authors.initials: H
authors.lastname: Amandus
authors.affiliation: University of Maryland, College Park, Maryland.
authors.forename: Parisa
authors.initials: P
authors.lastname: Damadi
authors.affiliation: Aspen of DC, Inc, Morgantown, West Virginia.
authors.forename: Nan
authors.initials: N
authors.lastname: Wu
authors.affiliation: Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, MS 1811, Morgantown 26505, West Virginia.
authors.forename: Srinivas
authors.initials: S
authors.lastname: Konda
authors.affiliation: Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, MS 1811, Morgantown 26505, West Virginia.
authors.forename: Scott
authors.initials: S
authors.lastname: Hendricks
keywords: Ecological study; Generalized estimating equations; Intervention; Public health; Retrospective time series; Robberies; Safety equipment; Taxicab driver homicides; Workplace violence