How do texting, handheld phones, and hands-free phones compare with each other in their effects on driving?

  • How do texting, handheld phones, and hands-free phones compare with each other in their effects on driving?
  • How do other, traditional distractions compare to cell phone use in their effects on driving (such as eating, attending to children, talking to passengers, listening to music/news, etc.)?
  • Can cell phone use while driving be compared with drunk driving? Why or why not?
  • What other variables (such as age) can affect driving while using a cell phone?