What unique feature do CTA buses have for better visibility?

The correct answer highlights the use of LED destination signs on CTA buses, which play a crucial role in improving visibility for both passengers and drivers. These signs display clear and bright information regarding the bus's route, destination, and stops, making it easier for individuals waiting at bus stops to identify the correct bus. The high visibility of LED lights also ensures that the information is legible from a distance and in various weather conditions, enhancing overall safety and efficiency in public transportation.

In contrast, while flashing indicator lights might be used for signaling turns or stops, they do not serve the specific purpose of displaying route information. Enhanced rearview mirrors improve visibility for drivers but do not assist passengers in identifying their bus. Bright colored buses may help with general visibility but do not provide the detailed information necessary for navigating the transit system effectively. Thus, the LED destination signs are a distinct feature that directly addresses the need for clear communication to passengers.