Maintaining a crash avoidance space is a part of defensive driving. This rule of thumb, also known as three second rule, is maintained by the driver to follow a safe driving distance at any speed, with an appropriate distance between his car and the other car. Parramatta driving school propagates this rule which plays a major role in safety.
But how does one count or determine the three seconds? Well, all you need to do is count three seconds in your head to judge your crash avoidance space. First select an object in front of your vehicle; it could be a lamp post, a tree, or a signboard. When the vehicle ahead of you passes that object, slowly just count one thousand and one, one thousand and two and one thousand and three. However, if you reach the focussed object before completing your count, then you are following too closely. So go a little slow and make sure that there are three seconds between you and the car ahead. This will give you time and distance to tackle any unfortunate problems in the lane ahead of you. Sydney driving lesson teaches this in a practical manner to all its students and thus helps them master low risk driving.
However, though the three second rule is the golden rule, when the weather conditions are not favourable, or if there is major traffic or if its dark or late night hours, you can double the three second rule to six or even nine seconds. This three second rule is handy and useful in avoiding tailgating, i.e. following a vehicle too closely, which has been often reported as a major cause of most of the rear end collisions. A good driving instructor will always alert you about the perils of tailgating and will be taught in a driving lesson.
Let’s look at an example to understand this concept of three second rule further. Assume you are driving at a speed of 25 m.p.h and the distance travelled is 37 ft. per second. In good road and clear climate conditions the safe interval should be three seconds for 111 ft. If the condition is marginal then the safe interval should be six seconds for 222 ft. However, the distance changes at different speeds.
So, control speed and increase safety. Follow the three second rule and minimize the risks or accidents on the roads while you are driving!