As another “study” comes out claiming the snake oil of speed scameras. Note to be wary of “study’s” that don’t make a apples to apples comparison like take into account
- traffic flow (using a higher traffic count vs another). Traffic might be avoiding camera area.
- Using crashes not caused by exceeding the speed limit (and in one interesting case in uk a pedestrian who fell off a bridge, no car involved).
- Using shorter time frames in camera period to mask no difference.
Here are some study’s from the past.
“The Association of British Drivers (ABD) fought with the camera partnership for release of crash data under the Freedom of Information Act. According to the documents, the crashes cited in the formal justification for the placement of cameras on the M4 include:
- an accident where a pedestrian fell from a bridge
- an accident where a gust of wind pushed one truck into another
- several tire blowout accidents 0 a crash where a car drove the wrong way”
http://www.thenewspaper.com/news/05/538.asp