What does a blue reflector (cat's eye) on the road indicate?

A blue reflector, commonly referred to as a cat's eye, indicates the presence of a fire hydrant. These reflectors are strategically placed along the sides of the road to help emergency services locate fire hydrants quickly, especially in low visibility conditions such as at night or during inclement weather. They are crucial for ensuring that firefighters can access water supplies without delay, thus enhancing safety and response times during emergencies.

In contrast, the other options represent different indicators on the road that do not entail the blue reflector. For example, a roadwork zone would typically use orange reflectors or signs, a no parking area would have clear signage without the use of blue reflectors, and school zones are indicated by specific warning signs and yellow reflectors designed to alert drivers to slow down for children. Understanding these distinctions is important for road safety and awareness.