Thanks, CWatson, I reviewed the 'LogicBasedOnEntityState', therefore, I only can flag one type of ModelEntity for each bus.
How I can specify multiple types of entities with the unique distribution; for example, the first bus; 0.3 Adults, 0.3 Teens and 0.4 Seniors, and the second bus 0.4 Adults, 0.2 Teens and 0.4 Seniors? May I link bus number with a table of entities profile, for instant?