Tempe crashes rise after cameras removed

 

This is an interesting story.

The title is:

Tempe crashes rise after cameras removed

but here's a minor title:

Quote:

But collisions dip at 5 of 7 sites that police monitored

Quote:

Accidents at two busy Tempe intersections rose dramatically after photo-enforcement cameras were removed last July, according to data obtained by The Republic.

At the same time, accidents dropped slightly at the five other intersections where the cameras had been used.

The total number of accidents at all seven intersections went to 140 from 125, according to the data.

Read more: http://www.azcentral.com/community/tempe/articles/2012/01/18/20120118tempe-crashes-rise-after-cameras-removed.html#ixzz1jzBZWnx7

Read more: http://www.azcentral.com/community/tempe/articles/2012/01/18...

Other pages

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http://www.poi-factory.com/node/21626 - red light cameras do not work

Too small a sample for conclusions.

Too small a sample for conclusions.

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Zumo 550 & Zumo 665 My alarm clock is sunshine on chrome.

Now that gives them excuse

Now that gives them excuse to put more camera

Not enough data

Not enough data to support a statistically valid conclusion.

But when has that ever stopped people?

Misleading headline contradicted by the article contents as well.

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Nuvi 2460, 680, DATUM Tymserve 2100, Trimble Thunderbolt, Ham radio, Macintosh, Linux, Windows

Another idiot wants them gone

This morning Iowa's little governor Braindead in the DSM Register said he would back a bill to disallow speeding cameras in Iowa. He admitted that he got caught by one in Arizona.
http://blogs.desmoinesregister.com/dmr/index.php/2012/01/19/...

Comparison was improper

From the article

"The data compared the accident rates at the intersections during the four months before and the four months after Tempe's removal of the Redflex Traffic System cameras on July 20, 2011."

I would think that the before and after time-period comparison should have been for the four months beginning on July 20, 2010 against the four month time frame after July 20, 2011. This would more closely match driving patterns particularly school activity. Note the article says "
Sheer traffic volume could be partly to blame for the spike at the two intersections, which are near Arizona State University."

As mentioned above, the amount of data may not be statistically significant.