Final answer:
The sign that says 'Narrow Bridge' is a traffic sign used to warn drivers about a narrow bridge ahead. Drivers should slow down and proceed with caution.
Step-by-step explanation:
The sign that says 'Narrow Bridge' is a traffic sign used to warn drivers that the bridge ahead is narrow and may not be able to accommodate two cars passing in opposite directions at the same time. It is important for drivers to slow down and proceed with caution when approaching a narrow bridge to avoid collisions and ensure safe passage.