DPS 2009 Numbers Not All They are Cracked Up To Be
Local news outlets tonight are regurgitating with 2009ís traffic statistics which show a significant decrease in crashes when compared to previous years. Naturally, the credit is all going to photo enforcement Ė completely ignoring other significant contributing factors and trends: fewer miles driven due to the economy and unemployment (and less-crowded roads), new, draconian DUI laws, stricter teen driverís license laws, safer cars, improved roads, and more.
So we did some number crunching of their own, and the results are NOT surprising. Our neighbor Nevada, who isnít using photo radar experienced a similar decline in crashes when compared to Arizona. Their data is available DPSí press release, but unfortunately does not include December data (yet). Still, the numbers provide much-needed perspective. To arrive at these numbers, we summed the data from the Northern, Central, and Southern regional Nevada reports.
In the end, Arizona beat Nevada by only 5% in total crash reduction and 4% in road fatalities. Suddenly, the 26% reduction in fatalities isnít the grand achievement DPS is trying to take credit for. Nevada came VERY close, and did it without scameras and talivans.
Another problem with the Arizona data is that the numbers are statewide for all DPS-investigated crashes. This includes thousands and thousands of miles of roads, but there are only 36 fixed camera locations and 40 mobile units distributed about the state, so the sphere of influence for the cameras is quite limited. Scameras canít be credited for alleged improvements in locations where they arenít installed or frequently present.
And while weíre at itÖ Have you ever wondered why the state doesnít follow the advice set forth in ? Despite understanding that the 85th-percentile speed is the safest speed, most roads around the state are set far below this standard. Kudos to Utah for trying to comply with this standard and actually raising limits with ADOTís speed limit information page.
Update: See Fox news coverage of this store very positive results.