Originally posted by Tingkai
A quick Google search suggest that red-light cameras tend to reduce overall number of accidents. The number of rear-enders increases slightly in some, but not all cases. Where increase occur, it is offset by reduction of right-angle crashes.
A quick Google search suggest that red-light cameras tend to reduce overall number of accidents. The number of rear-enders increases slightly in some, but not all cases. Where increase occur, it is offset by reduction of right-angle crashes.
D.C. Red-Light Cameras Fail to Reduce Accidents
By Del Quentin Wilber and Derek Willis
Washington Post Staff Writers
Tuesday, October 4, 2005; A01
The District's red-light cameras have generated more than 500,000 violations and $32 million in fines over the past six years. City officials credit them with making busy roads safer.
But a Washington Post analysis of crash statistics shows that the number of accidents has gone up at intersections with the cameras. The increase is the same or worse than at traffic signals without the devices.
Three outside traffic specialists independently reviewed the data and said they were surprised by the results. Their conclusion: The cameras do not appear to be making any difference in preventing injuries or collisions.
"The data are very clear," said Dick Raub, a traffic consultant and a former senior researcher at Northwestern University's Center for Public Safety. "They are not performing any better than intersections without cameras."
By Del Quentin Wilber and Derek Willis
Washington Post Staff Writers
Tuesday, October 4, 2005; A01
The District's red-light cameras have generated more than 500,000 violations and $32 million in fines over the past six years. City officials credit them with making busy roads safer.
But a Washington Post analysis of crash statistics shows that the number of accidents has gone up at intersections with the cameras. The increase is the same or worse than at traffic signals without the devices.
Three outside traffic specialists independently reviewed the data and said they were surprised by the results. Their conclusion: The cameras do not appear to be making any difference in preventing injuries or collisions.
"The data are very clear," said Dick Raub, a traffic consultant and a former senior researcher at Northwestern University's Center for Public Safety. "They are not performing any better than intersections without cameras."
A 2007 Virginia Department of Transportation study found:
"The cameras were associated with an increase in total crashes... The aggregate EB results suggested that this increase was 29%... The cameras were associated with an increase in the frequency of injury crashes... The aggregate EB results suggested an 18% increase, although the point estimates for individual jurisdictions were substantially higher (59%, 79%, or 89% increases) or lower (6% increase or a 5% decrease)."
A 2006 Winnipeg, Canada city audit found:
"The graph shows an increase of 58% in the number of traffic collisions from 2003 to 2004.... Contrary to long-term expectations, the chart shows an increase in claims at each level of damage with the largest percentage increase appearing at the highest dollar value."
A 2005 Virginia DOT study found:
"The cameras are correlated with an increase in total crashes of 8% to 17%."
In 2005, The Washington Post found:
"The analysis shows that the number of crashes at locations with cameras more than doubled, from 365 collisions in 1998 to 755 last year. Injury and fatal crashes climbed 81 percent, from 144 such wrecks to 262. Broadside crashes, also known as right-angle or T-bone collisions, rose 30 percent, from 81 to 106 during that time frame."
A 2004 North Carolina A&T University study found:
"Our findings are more pessimistic, finding no change in angle accidents and large increases in rear-end crashes and many other types of crashes relative to other intersections."
A 2003 Ontario Ministry of Transportation study found:
"Compared to the average number of reported collisions occurring in the before period, the average yearly number of reported collisions increased 15.1 per cent in the after period."
A 1995 Australian Road Research Board study found:
"The results of this study suggest that the installation of the RLC at these sites did not provide any reduction in accidents, rather there has been increases in rear end and adjacent approaches accidents on a before and after basis and also by comparison with the changes in accidents at intersection signals."
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