Speed Limits and Safe Following Distance
Armenian speed limits are set by road type and area, and exam questions test both the default limits and the situations that require you to go slower than the limit. In built-up areas the general limit is 60 km/h; outside built-up areas it is 90 km/h; on motorways it rises to 110 km/h. These are maximums, not targets - you must always drive at a speed that lets you stop within the distance you can see to be clear.
The safe following distance is the concept most often missed. The two-second rule is the baseline in dry conditions: pick a fixed point, and ensure at least two seconds pass between the car ahead reaching it and you reaching it. Double it to four seconds in rain or at night, and increase further on ice or gravel. At 90 km/h, two seconds is about 50 metres - roughly the length of the stopping distance plus reaction. Total stopping distance combines reaction distance (speed × reaction time) and braking distance (which grows with the square of speed). Doubling speed quadruples braking distance.
Traps: questions ask for the limit on a road outside a built-up area when a sign is absent (90), or test whether a lower sign overrides the default (it does). Another trap is the assumption that ABS shortens stopping distance on ice - it does not; it preserves steering.
Worked example: at 60 km/h you travel about 17 m per second, so a two-second gap is about 34 m. In rain, double it to roughly 68 m.