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The Definition of Defensive Driving

Defensive driving is a set of driving practices that help drivers anticipate hazards and other road users' mistakes, so they can avoid crashes regardless of conditions or the actions of others.

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Defensive Driving definition

Definition of Defensive Driving

Defensive driving is a way of driving that anticipates hazards and other drivers' errors, so the driver has the time and space to avoid a crash.

A defensive driver does not assume other people will follow the rules. They watch for the car that runs a red light, the pedestrian who steps out, or the truck that drifts into their lane. They manage speed and following distance so they can stop or steer away in time. The goal is simple: avoid crashes, even when someone else makes the mistake.

Motor vehicle crashes are a leading cause of work-related deaths. Defensive driving applies to anyone who drives for work, from long-haul truck drivers and delivery drivers to sales staff, field technicians, healthcare workers and field crews whose trips to remote sites fall under journey management. It is a core element of most fleet safety programs.

Key Elements of Defensive Driving

Seeing and Planning Ahead

  • Scan far ahead: Look 12 to 15 seconds down the road, not just at the vehicle in front. This gives early warning of slowing traffic, merging vehicles and hazards.
  • Check mirrors often: Know what is beside and behind you at all times. Be aware of other vehicles' blind spots and stay out of them.
  • Plan escape routes: Always know where you would go if the vehicle ahead stopped suddenly, such as an open lane or the shoulder.

Space and Speed

  • Following distance: For cars in good conditions, keep at least a 3-second gap behind the vehicle ahead. Increase it in rain, snow, fog or darkness.
  • Large vehicles: CDL manuals advise at least one second for every 10 feet of vehicle length, plus one more second at speeds above 40 mph.
  • Space cushion: Keep open space around the vehicle, not just in front, so you have room to react.
  • Manage speed: Drive at a speed that fits the road, traffic and weather, even if it is below the posted limit.

Driver Condition and Behavior

  • Seat belts: Wear a seat belt on every trip, and require passengers to do the same.
  • No distraction: Put phones away and set navigation before driving. Distracted driving takes eyes, hands and attention off the road.
  • Fatigue: Do not drive while drowsy. Take breaks on long trips and stop if you feel tired.
  • Calm attitude: Do not respond to aggressive drivers. Let them pass and keep your distance.

Regulations and Standards

OSHA

There is no OSHA standard that specifically requires defensive driving training. OSHA, the National Highway Traffic Safety Administration (NHTSA) and the Network of Employers for Traffic Safety (NETS) jointly published the "Guidelines for Employers to Reduce Motor Vehicle Crashes." The guidelines recommend driver selection, training, policies on seat belts and distraction, vehicle maintenance and crash reporting.

ANSI/ASSP Z15.1

ANSI/ASSP Z15.1 is a voluntary national standard for safe practices in motor vehicle operations. It gives organizations a framework for a fleet safety program, including management leadership, driver qualification, driver training, vehicle maintenance and incident reporting. Check the current edition for specific requirements.

FMCSA Entry-Level Driver Training

The FMCSA Entry-Level Driver Training (ELDT) rule, in 49 CFR Part 380, Subparts F and G, has applied to new commercial driver's license applicants since February 7, 2022. New drivers must complete theory and behind-the-wheel training from a registered provider before taking certain CDL skills tests. The training curriculum covers safe driving skills such as space management, speed management and hazard perception.

Training Providers

The National Safety Council offers defensive driving courses for employers and individuals. Many insurers and fleet safety vendors also offer courses, sometimes combined with in-vehicle coaching.

Good Practices for Defensive Driving

  • Train all drivers, not just CDL holders: Anyone who drives for work, including in personal vehicles, should complete defensive driving training and periodic refreshers.
  • Set clear policies: Require seat belts, ban handheld phone use, and set expectations for speed and following distance in your vehicle safety program.
  • Use data to coach: Vehicle telematics can flag harsh braking, speeding and close following. Use the data for coaching, not just discipline.
  • Manage fatigue: Plan trips with rest breaks and limits on driving time. Link driving policies to your fatigue risk management system.
  • Plan the journey: Check weather, road conditions and routes before leaving. Tools like SafetyIQ journey management can help track trips and check-ins.
  • Adjust for conditions: Slow down and increase following distance in rain, snow, fog, glare and darkness.

Example of Defensive Driving

A regional HVAC service company had several rear-end crashes in one year, all involving technicians driving vans in city traffic. Telematics data showed frequent harsh braking and following distances under 2 seconds. In one crash, a technician looked down at a work order on his phone and hit a car that had stopped for a pedestrian.

The company enrolled all technicians in a defensive driving course and set a policy of at least a 3-second following distance and no phone use while driving. Supervisors received weekly telematics reports and held short coaching talks with drivers who had repeated harsh braking events. Dispatch stopped calling technicians while they were driving. Over the next year, harsh braking events dropped by more than half and the company had no rear-end crashes.

Frequently Asked Questions: Defensive Driving

What is the 3-second rule in driving?

The 3-second rule is a way to measure following distance. Pick a fixed point, and when the vehicle ahead passes it, count the seconds until you reach it. For cars in good conditions you should count at least 3 seconds, and more in bad weather.

Is defensive driving training required by OSHA?

No. OSHA has no standard that specifically requires defensive driving training. However, OSHA, NHTSA and NETS recommend driver training in their employer guidelines, and many insurers and customers expect it.

How much following distance should a truck driver keep?

CDL manuals advise at least one second for every 10 feet of vehicle length, plus one more second at speeds above 40 mph. A 70-foot tractor-trailer at highway speed would need at least 8 seconds. Drivers should add more time in poor conditions.

What are the main defensive driving techniques?

Key techniques include scanning 12 to 15 seconds ahead, keeping a space cushion, managing speed, wearing seat belts, and avoiding distraction and fatigue. Defensive drivers also adjust for weather and always plan an escape route.

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