Traffic Signs, Signals and Road Markings
You must be able to read three families of information: signs (regulatory, warning, information), signals (police, traffic lights, hand signals) and road markings (lines, arrows, box junctions, hatched areas). Regulatory signs such as stop, give way, no entry and speed limits are mandatory; warning signs are usually triangular with a red border; information signs are rectangular. Learn the shapes and colours because exam questions often describe a sign rather than show it.
Signals: a police officer's signals override traffic lights and signs. A flashing amber at a pedestrian crossing means give way to pedestrians on the crossing. A green light means proceed only if the way is clear - it is not an absolute right. Hand signals from other drivers (slowing down, turning) must be recognised.
Markings: a continuous (solid) white or yellow line must not be crossed; a broken line may be crossed when safe. Double continuous lines mean no overtaking in either direction. Box junctions must not be entered unless your exit is clear. Hatched areas bordered by solid lines must not be entered except in emergency.
Trap: questions that ask what to do when a traffic light is green but the junction is blocked - the answer is to wait, not to enter. Worked example: solid centre line on your side with a broken line on the other side means you may not cross, but oncoming traffic may.