Sight Distance Rule

Drive at a speed where you can always safely stop. To tell if you are driving too fast for conditions, use the “Four-Second Sight Distance Rule.” Pick out a stationary object as far ahead as you can clearly see (e.g., a sign or a telephone pole). Start counting “one-one-thousand, two-one-thousand, three-one-thousand, four-onethousand.”

If you reach the object before you finish saying “four-one-thousand,” you need to slow down. You are going too fast for your sight distance. You must not drive faster than the distance you can see. If you do, you are not safe and could injure or kill yourself or others.