Road Signs, Markings and Traffic Signals
Sign families
Bulgarian signs follow the Vienna Convention shapes: triangles warn, circles order (red border = prohibition, blue = mandatory), rectangles inform, and octagons stop. Learn to read a sign by shape and colour even before you read the symbol - that is exactly what many exam questions test. Priority signs form their own group: the yellow diamond means priority road, its struck-through version ends that priority, and the inverted triangle means yield.
Markings and signals
Markings work with signs. A continuous white line must not be crossed; a broken line may be crossed when safe. Zigzag or thick lines near crossings and stops mean no stopping. Yellow markings often indicate parking or stopping restrictions. Traffic lights: red means stop before the line; flashing amber means proceed with caution and give way; a green arrow permits movement only in that direction. A police officer's signals override lights, which override signs, which override markings - memorise this chain.
Traps
Questions love signs that look alike: "no entry" versus "no vehicles", "give way" versus "stop", and the end-of-restriction variants. Another trap is a mandatory blue sign that orders a direction rather than merely recommending it. Watch for signs with supplementary plates that change the meaning by time, distance, or vehicle category - a moped may be exempt or specifically banned.
Worked example
You see a blue circular sign with a white bicycle and a red slash through it. Blue circle means mandatory, so a slash means the mandatory route ends - it does not forbid bicycles. If the question asks whether you may continue, the answer is yes, subject to general rules.