Will the bus rider wait till all passengers who signed up before leaving? What if one of them happened to not take the bus but forgot to cancel the ride, will this result in longer traveling time?

The bus will leave on time based on the timing on the boarding pass, once the time has passed, the bus will leave the stop even if not all passengers have boarded the bus. This will not affect the travel time. Please be at the stop 10 minutes before the assigned timing.