Road Signs, Signals, and Markings
Road signs in Bangladesh fall into three families: regulatory (red circles, prohibitory; blue circles, mandatory), warning (triangles with red borders), and informatory (usually rectangles in blue or green). Learn shapes before symbols, because a question may describe a sign in words rather than show it. A red circle with a diagonal bar means do not; a red circle without a bar usually states a limit or prohibition; a triangle always warns of a hazard ahead; an octagon is reserved for STOP and a downward-pointing triangle for GIVE WAY.
Traps to watch: a no entry sign (solid red disc with a white bar) is often confused with no parking (red circle with one or two diagonal strokes) and no stopping (red circle with a cross). Warning signs are placed before the hazard, so the safe action is to slow down, not to stop abruptly. Traffic lights follow the sequence red → green → yellow (amber); amber means stop unless stopping is unsafe, never "speed up". Flashing amber means proceed with caution. Lane markings matter too: a solid white centre line forbids crossing, a broken line permits overtaking when safe, a solid yellow line marks the edge of the carriageway, and zebra stripes belong to pedestrians.
Worked example: A question says a driver approaching a junction sees a downward-pointing triangle. The answer is give way: slow, look both ways, and yield to traffic on the main road - not stop completely unless traffic requires it.
Rule of thumb: shape first, colour second, symbol third.