The 11th annual observance of Drive Safer Sunday on Nov. 29 reminds Americans taking holiday road trips to focus on being rested and attentive to dangers inside and outside their cars, says nonprofit Road Safe America. Drive Safer Sunday falls on what is traditionally the busiest highway travel day of the year -- the Sunday following Thanksgiving. It has been prompted by an official resolution from the U.S. Senate.The observance is sponsored by Road Safe America, a nonprofit dedicated to reducing collisions between tractor trailers and passenger vehicles.