What does a "narrow bridge" sign look like, and how should the driver react when he sees one?

A "narrow bridge" sign is designed to alert drivers that the roadway will become narrower ahead as it approaches a bridge. The sign is typically depicted as a yellow diamond shape, which is a warning sign used to indicate potential hazards on the road.

When drivers see this sign, they should slow down to ensure they have adequate control over their vehicle as they approach the narrowed area. Slowing down allows the driver to be more vigilant and prepared for any potential challenges, such as oncoming traffic or limited space for maneuvering. This response is particularly important for ensuring safety both for the driver and for other road users, including any vehicles crossing the bridge simultaneously.

The other signs mentioned do not accurately represent the characteristics or instructions associated with a narrow bridge. For example, blue rectangles generally provide information about services, while red ovals typically indicate prohibitions. Green squares tend to guide drivers in directional matters, and none of these options communicate the necessary action of slowing down when approaching a narrow bridge.