A new study measured drivers’ physical impairment when using cell phones versus headsets and found that reaction time, accuracy, and consistency of speed all improved significantly when the driver used a headset. The test, sponsored by Plantronics, used a driving simulator to compare driving ability under both conditions. Most other studies have focused solely on the mental distraction of using a cell phone while driving.
Background Freightliner
The National Transportation Safety Board takes exception with the National Highway Transportation Safety Administration's decision.