Speed Limits and Safe Following Distance
What the exam tests
This domain tests default Lebanese limits, the effect of conditions, and whether you can calculate a safe gap rather than repeat a slogan. Posted limits are maximums, not targets.
Core rules
- Lebanon's default limits are commonly 50 km/h in built-up areas, 80 km/h outside built-up areas and 100 km/h on motorways unless a sign says otherwise. Always obey the posted limit and drive below it when conditions demand.
- The two-second rule gives a minimum dry-weather gap. Double it in rain, at night, on gravel or when following a large vehicle that blocks your view.
- Speed must allow you to stop within the distance you can see to be clear. On a crest, bend or in fog, that may be far below the limit.
- Heavy vehicles, buses and vehicles towing trailers need longer gaps because of mass and braking distance.
- Slow down near schools, pedestrian crossings, roadworks and parked cars where a child or door may appear.
Worked example
You travel at 90 km/h. Divide by 3.6: about 25 metres per second. A two-second gap is about 50 metres. In heavy rain, use at least three seconds, about 75 metres, and reduce speed because braking distance also increases. Reasoning: the gap must cover reaction and braking, and wet roads reduce tyre grip.
Traps
Treating the limit as safe in fog; measuring the gap from the car ahead rather than a fixed roadside point; forgetting that a loaded vehicle needs more distance; tailgating to prevent another driver entering; ignoring a lower temporary limit at roadworks.