Right-of-Way and Intersections
Right-of-way rules decide who goes first when paths conflict. At an unmarked junction, the general rule is that you give way to traffic already on the main road and to vehicles approaching from your right, unless signs or markings say otherwise. A GIVE WAY sign or line means slow down, be ready to stop, and let traffic on the priority road pass. A STOP sign means a complete stop at the line before you look and proceed.
At roundabouts, traffic already circulating has priority. Approach slowly, look right, and enter only when there is a safe gap. Signal left when you intend to leave at the first exit, and signal left after passing the exit before yours for later exits. Do not change lanes inside a roundabout without checking mirrors and blind spots.
At traffic lights, a green light gives you priority to proceed straight or turn, but you must still yield to pedestrians already crossing and to vehicles legally in the junction. When turning across oncoming traffic, you must wait for a safe gap; oncoming vehicles are not obliged to stop for you.
Traps in questions include assuming a driver turning left always has priority, or that a green light means you may block the junction. Another trap is forgetting that pedestrians on a zebra crossing have priority once they have stepped onto it. Also remember that emergency vehicles with sirens and flashing lights should be given way, but you must not break the law or endanger others to do so.
Rule of thumb: stop line, then look right, left, right again; proceed only when your exit is clear.