Safe and Defensive Driving Practices
This domain tests whether you can teach a student to see, predict, and create margin - not merely to obey signs. The examiner expects a working vocabulary of defensive-driving systems and the numbers that go with them.
Two systems worth naming
IPDE - Identify, Predict, Decide, Execute - is a repeatable scan cycle. The Smith System gives five habits: Aim high in steering, Get the big picture, Keep your eyes moving, Leave yourself an out, Make sure others see you. Teach both as habits, not slogans: ask the student to narrate hazards on a quiet street until the narration becomes silent and automatic.
Space and time
- Minimum following distance is two seconds; four in rain; more in fog, at night, or behind trucks and motorcycles.
- Scan 12–15 seconds ahead, roughly a block in the city and a quarter mile on the highway.
- Maintain a cushion on all four sides and avoid riding in another driver's blind spot; if you must be there, pass promptly.
Conditions
Rain: hydroplaning begins as speed rises and tires lose contact; ease off the accelerator, hold the wheel straight, and avoid hard braking. Fog: low beams, never high beams, which reflect back. Night: don't overdrive your headlights - drive so you can stop within the lit distance. Ice: every input - steering, throttle, brake - becomes smaller and slower.
Sharing the road
Large trucks have no-zones on both sides, need far more room to stop, and swing wide before a right turn. Motorcycles and bicycles are narrower than they appear and deserve extra following distance. Pedestrians, especially children and people with disabilities, are unpredictable - cover the brake early.
Worked example
At 60 mph a vehicle travels about 88 feet per second. Two seconds is roughly 176 feet; on wet pavement the same gap should be four seconds, about 352 feet. Ask the student to count "one-thousand-one, one-thousand-two" from the moment the car ahead passes a fixed object - and to recount, not guess.
Traps that cost marks
Counting following distance from the wrong reference point. Treating the posted limit as a target rather than a maximum. Watching only the car directly ahead instead of looking through its windows to traffic beyond it.