What type of light hanging overhead indicates changes in travel direction during rush-hour traffic?

The correct answer is indeed lane signal. Lane signals are used to communicate real-time information to drivers about which lanes are open or closed for travel, especially during heavy traffic periods such as rush hour. These lights can indicate when a lane is designated for one direction of travel or when it is blocked, providing essential guidance for safe and efficient roadway use.

Lane signals typically utilize colored lights that indicate whether a lane should be used or if it is unsafe. For example, a green arrow means that a lane is available for travel, while a red X signals that the lane is closed. This system helps manage traffic flow dynamically, reducing congestion and enhancing safety on the roads.

In contrast, warning lights are intended to alert drivers to specific hazards, but they do not provide direct information about lane usage. Traffic signals control intersections rather than manage lane-specific adjustments, and directional signs give static information regarding routes but do not indicate immediate changes in lane availability. This distinction underscores why lane signals are the appropriate answer in this context.