Quiz: How Dangerous Is Texting Behind the Wheel? Test Your Knowledge of Distracted Driving

April 21, 2011 — -- How dangerous is texting or talking on your cellphone behind the wheel?

More dangerous than you might think -- some safety advocates say we are in a national state of denial about the dangers posed by using a cellphone while driving. Check out the questions below to test your knowledge of distracted driving and watch "20/20" this Friday at 10 p.m. to learn even more!

QUESTION 1: Vote and then click here to watch an interview with U.S. Transportation Secretary Ray LaHood for the correct answer.

QUESTION 2: Vote below and then click here to watch an interview with University of Utah Psychology Professor David Strayer for the correct answer.

QUESTION 3: Vote below and then click here to watch an interview with University of Utah Psychology Professor David Strayer for the correct answer.

QUESTION 4: Vote below and then click here to watch an interview with University of Utah Psychology Professor David Strayer for the correct answer.