Frequency (how often a service operates) and span (how long service runs during the day and night) measure how much service is available. Availability determines how convenient and attractive transit service is to current and potential riders.
Transit that operates both frequently and for a long period provides a higher level of service to a broader cross-section of the population. A more diverse ridership can better sustain higher levels of service, which generates a virtuous cycle: Transit that better serves riders encourages more people to use it more frequently.
More frequent service and longer hours of service can:
- Make transit service more convenient.
- Give riders more flexibility with their own schedule.
- Establish transit as a viable travel choice for more than just work.
- Make transit easier to use and understand.