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Safe Following Distance
- 1/20If you follow another vehicle too closely in traffic
Tailgating reduces your reaction time, especially in heavy trucks that require longer stopping distances. Maintaining space allows time to react to sudden stops.
When you maintain a 4-second following distance
A 4-second rule allows enough time to stop or avoid hazards. This is especially important in trucks that take longer to brake than smaller vehicles.
You reduce your following distance during heavy rain
Wet roads increase braking distance. Reducing following distance in rain is dangerous and can lead to skidding or losing control.
If you are driving behind a motorcycle or smaller vehicle
Smaller vehicles can stop more quickly than trucks. Give them extra room to avoid rear-ending them in sudden braking situations.
When you drive at higher speeds
The faster you go, the longer it takes to stop. More space is needed to account for reaction time and braking distance.
You follow another truck too closely
Large vehicles block your view of traffic ahead. Keeping distance helps anticipate hazards and respond safely.
If you are being tailgated by another vehicle
This gives you more room to stop gradually and reduces the chance of being rear-ended if you brake suddenly.
When you are towing a heavy load
Heavier loads reduce braking efficiency. More space allows safer stops and prevents collisions, especially downhill.
You follow closely in city traffic
Urban roads have frequent stops. Maintaining distance reduces stress, fuel consumption, and collision risks.
If you maintain poor following distance on a slope
Uphill and downhill driving affects braking power. Sufficient distance prevents crashes in case of slowdowns or engine brake failure.
When visibility is reduced due to fog or dust
Poor visibility means you can’t see brake lights or obstacles in time. More distance gives extra safety buffer.
You do not adjust your following distance during night driving
Darkness limits perception. Truck drivers need more time to detect hazards and respond, making longer distances essential.
If you are driving in traffic with frequent lane changes
Sudden merges or lane shifts are common. More distance reduces your chance of reacting too late to an unexpected vehicle.
When roads are covered in oil, sand, or gravel
Slippery or loose surfaces increase stopping distance. Safe following distance helps regain control if tires lose traction.
You reduce distance to rush through traffic
Tailgating can provoke other drivers and lead to road rage or reckless decisions. Staying calm and spaced is safer.
If your brakes are slightly worn or less effective
Worn brakes slow down stopping time. Allowing more space ensures you still have time to react safely.
When driving near intersections or crosswalks
Pedestrians or turning vehicles may stop abruptly. Having distance lets you stop smoothly without jerking or endangering others.
You follow closely during a downhill descent
Trucks can overheat brakes downhill. Leaving space avoids overuse and allows use of engine braking or lower gears.
If you drive behind a vehicle carrying loose cargo
Debris may fall unexpectedly. More following space allows you to avoid road hazards and protect your windshield.
When traffic is stop-and-go
Inconsistent gaps cause unnecessary braking and increase rear-end collision risk. Smooth spacing improves safety and fuel use.