Big news: The National Highway Traffic Safety Administration has recently released a technical report finds DRLs are of practically no use, and further admits that DRLs have negative safety consequences. In NHTSA’s own words:
"The analysis found that DRLs have no statistically significant overall effect on the three target crashes. When combining these three target crashes into one target crash, the drl effects were also not statistically significant. When examined separately for passenger cars and light trucks / van (LTVs) , drls in LTVs significantly reduced LTVs involvement in the target two vehicle by 5.7 percent. However, the remaining drl effects on these three target crashes were not statistically significiant. Although not statistically significant, drls might have unintended consequences for pedestrains and motorcycles. Particularly, the estimated negitive effects for LTV’s were relatively large and cannont be completely ignored.
“Currently the NHTSA is in the rulemaking process in response to General Motors (GM) petition to mandate DRLs. This report will affect the rulemaking decision. Therefore the report is considered to contain ‘highly influential scientific information’.”
The document can be found at www.regulations.gov and entering 2008-0153-0004 in the Search field.