Defensive driving and following distance

Key points

1. Look ahead at least 10 to 15 seconds.

   Source: Handbook p. 66

   “Take in the situation on the road at least 10-15 seconds ahead.”
   Nebraska Driver's Manual, Handbook p. 66

2. Check traffic behind you at least every 10 seconds.

   Source: Handbook p. 66

   “Check the traf4c behind at least every 10 seconds”
   Nebraska Driver's Manual, Handbook p. 66

3. Signal at least 100 feet before changing direction.

   Source: Handbook p. 66

   “Signal intentions at least 100 feet before planning to change direction.”
   Nebraska Driver's Manual, Handbook p. 66

4. With the three second rule, reaching the fixed point before three seconds pass means you are following too closely.

   Source: Handbook p. 66

   “Reaching the mark before three seconds pass is following too closely.”
   Nebraska Driver's Manual, Handbook p. 66

5. Increase the three second minimum by 1 second for each adversity factor, such as rain or heavy traffic.

   Source: Handbook p. 67

   “The three-second rule is a minimum requirement and should be increased by one-second for each adversity factor encountered”
   Nebraska Driver's Manual, Handbook p. 67

Numbers to know

3 questions from the Nebraska practice test

1. 1. How should the three second following rule be adjusted, according to the Nebraska manual?

   1. Subtract a second in heavy traffic
   2. Add one second for each adversity factor such as rain or heavy traffic
   3. Double it at night only
   4. Keep it fixed in all conditions
   Show answer

   Add one second for each adversity factor such as rain or heavy traffic. The three second rule is a minimum requirement and should be increased by one second for each adversity factor encountered, such as rain, heavy traffic, darkness or a large vehicle ahead. Maintain space on both sides of the vehicle as well, and when a driver behind you follows too closely, slow down and increase your own following distance to make room.

2. 2. How can a Nebraska driver use the three-second rule to check following distance?

   1. Count one second from the moment you see a brake light
   2. Count the seconds between the vehicle ahead passing a fixed point and your vehicle reaching it
   3. Stay exactly two car lengths behind at every speed
   4. Measure the distance only after entering an intersection
   Show answer

   Count the seconds between the vehicle ahead passing a fixed point and your vehicle reaching it. Choose a fixed roadside point, such as a sign or fence, and watch the vehicle ahead pass it. Count until your vehicle reaches that same point. Arriving before three seconds means you are following too closely, so slow down and create more space. Three seconds is the minimum, not a universal maximum. Add one second for each adversity factor, such as rain or heavy traffic. The two car length idea changes with speed and vehicle size, while a brake light gives no reliable baseline. Use the roadside point and count aloud as a quick practical cue.

3. 3. Which reference point can a driver use when applying Nebraska's three-second following rule?

   1. A point chosen only after the vehicle ahead brakes
   2. The speedometer needle alone
   3. The rear bumper of a parked car selected after changing lanes
   4. A fixed point such as an overpass, sign, fence, or corner
   Show answer

   A fixed point such as an overpass, sign, fence, or corner. The timing exercise works by comparing both vehicles with the same stationary marker. Nebraska gives examples including an overpass, sign, fence, or corner. When the lead vehicle passes that point, begin counting, then compare the count when your vehicle reaches it. The speedometer alone cannot reveal the actual time gap, and waiting for braking creates an unnecessarily late warning. Choose a visible fixed object early, maintain a steady speed, and increase the interval when weather or traffic makes stopping more difficult.

Source: the Nebraska Driver's Manual, Section 5: Special Driving Conditions. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.