where red light cameras were installed. Following the introduction of red light cameras in Western Australia, the number of serious right-angle crashes decreased by 40%, according to an article from the Canberra Times. In an article from the Xinhua General News Service, the Hong Kong transport department reported that in 2006 the monthly average number of crashes due to red light violations fell 25% and the number of people injured in these crashes decreased by 30%, following an increase in the number of red light cameras in use. North America In the U.S. and Canada, a number of studies have examined whether red light cameras produce a safety benefit. A 2005 study by the U.S. Federal Highway Administration (FHWA) suggests red light cameras reduce dangerous right-angle crashes. The FHWA study has been criticized as containing critical methodological and analytical flaws and failing to explain an increase in fatalities associated with red light camera use:(...)the authors spotlight the statistical difficulties of including the cost of fatalities, while ignoring the practical implications of such events (...) assuming that each angle injury crash had a societal cost of $64,468, when in fact the cost was $82,816 before camera use and $100,176 after camera use(...) Not all studies have been favorable to the use of red light cameras. A 2004 study of 17,271 crashes from North Carolina A & T University showed that the presence of red light cameras increased the overall number of crashes by 40%. This research received no peer review and is considered flawed by the IIHS. A 2005 Virginia Department of Transportation study of the long-term effects of camera enforcement in the state found a decrease in the number of right-angle crashes with injuries, but an increase in rear-end crashes and an overall increase in the number of crashes causing injuries. In 2007, the department issued an updated report which showed that the overall number of crashes at intersections with red light cameras increased. This report concluded that the decision to install red light cameras should be made on an intersection-by-intersection basis as some intersections saw decreases in crashes and injuries that justified the use of red light cameras, while others saw increases in crashes, indicating that the cameras were not suitable in that location. This study, too, is considered flawed by the IIHS. Aurora, Colorado experienced mixed results with red light cameras; after starting camera enforcement at 4 intersections,