http://www-nrd.nhtsa.dot.gov/Pubs/811379.pdf Read the whole thing ignoring highlights cause they never explain how they come up with the numbers, especially the explanation of the "Estimated percentages" Compare to the raw numbers found. If you look at table 2, they would have you believe that the percentage of people with cell phones is 20% or higher, BUT if you are somewhat smart you will figure out quite easily that the percentage is bogus. Also, I don't believe in estimates (a fancy term for guess), they are as useless as the person who gives it to me... theres more but i just wnated to point those out. Motor Vehicle Accidents and Fatalities - The 2012 Statistical Abstract - U.S. Census Bureau study 1109
Thank you for the links OrangeNerd. I always try to read more about a studies methodology to understand how they come up with numbers. There are good and bad scientists, and good and bad studies. With that said, I would like to flip your statement "they are as useless as the person who gives it to me" to estimates are as useful to me as the person who gives it to me. I like to know where the money for the study came from to help me determine the useful/uselessness of any estimate or stat. This type of statistic (texting causes accidents) seems very hard to generate because people will not want to offer this information to people who can record it for future studies. Unless there was a serious accident, investigators are not motivated to investigate the reason for the crash by checking cell phones and cell phone records. So instead of looking at all/many accidents and estimating texting contribution, I like this study that watched truckers over 6 million miles and came up with some interesting observations; http://news.cnet.com/8301-1035_3-10296992-94.html