Road Markings: Lines, Colours and What They Permit
Horizontal markings
Markings are either permanent (white) or temporary (orange/yellow). Temporary markings take precedence when they conflict with permanent ones. Longitudinal lines: a solid line may not be crossed; a broken line may be crossed when safe; a double solid forbids crossing in either direction; a combination of solid and broken forbids crossing from the solid side but permits it from the broken side. A double broken line separates lanes of opposite direction where overtaking is allowed from both sides.
Other markings
Stop line (transverse solid) marks where to stop at a STOP sign, traffic light or give-way point. Zebra stripes mark a pedestrian crossing; a driver must give way to pedestrians on it. Yellow zigzag or solid yellow lines along the kerb denote bus stops or no-stopping zones. Arrows indicate permitted directions per lane. A hatched island area must not be entered except when turning or when the line permits.
Traps
Questions exploit the solid-plus-broken pair: read which side you are on. They also test whether a broken line permits overtaking near a crossing (no, if it would endanger pedestrians) and whether you may cross a solid line to enter a driveway (only where markings permit; otherwise prohibited). Confusing the stop line with the crossing itself is common - stop before the line, not on the zebra.
Rule of thumb
"Solid = wall, broken = door." If the line on your side is solid, treat it as a wall; if broken, you may pass through it only when the manoeuvre is safe and legal.