There are buses running on time intervals and number of seats is not enough demand. As a result, the user has accumulated residual service to wait for the next bus.
The running of the bus are very far apart and the number of seats is not enough to meet demand. As a result, users accumulate. The need to wait for the next bus.
Running of the bus have so far apart and the number of seats, not enough demand. As a result, the user has to wait for the residues accumulate the next bus