In 2004, women's life expectancy exceeded men's life expectancy by 5.2 years, the smallest gender gap in life expectancy since 1946. Life expectancy for whites was five years greater than that of blacks. Life expectancy for black and white men and women was as follows: 1  Black male: 69.8 years.  White male: 75.7 years.
But, that's not always the case. Safe following distances vary according to traffic speed and weather conditions and according to the type of vehicle you're driving. In good conditions, you should allow 2 seconds between your car and the vehicle in front of you. Here's an easy way to work that out.
Many behind-the-wheel driving tests use cones. To begin, set up the cones in a deserted lot or very quiet street with little traffic. A spot that is 5 feet longer than your vehicle is ideal for practice. Once correctly parked, your car is 5 to 8 inches from the curb, although in some states, 12 to 18 inches are allowed.