Which aspect is critical for a bus route's effectiveness?

High-frequency service is critical for a bus route's effectiveness because it significantly enhances the convenience for passengers. When buses run frequently, riders experience reduced wait times, making the service more attractive. This increased reliability encourages transit use, as people appreciate the flexibility of not having to adhere to a strict timetable.

Moreover, high-frequency service can effectively cater to varying demands throughout the day, accommodating peak hours and ongoing traveler needs. This aspect can lead to higher ridership, improve the overall efficiency of the transit system, and contribute to a more sustainable transportation network by reducing reliance on personal vehicles.

In contrast, maximum distance between stops can negatively impact accessibility and discourage ridership, while complicated fare systems may create confusion and deter potential users. Limited operational hours can restrict access and usability, making it less functional for those needing public transport outside of traditional business hours. Hence, high-frequency service stands out as a key contributor to the overall success and effectiveness of a bus route.