Highway jam because driver keep changing lane to the fastest lane. Roundabout jam because no driver know how to use roundabout. Minor road jam because driver looking for parking space and looking at their phone. Junction jam because every driver want to go first. School area jam because every parent want their kid to be sent directly in front of the gate. In short, it’s the selfishness that causes majority of traffic jam, this is something unteachable and unavoidable.