Before revision: Two buses together on the same route In public transport, bus bunching, clumping, convoying, piggybacking or platooning is a phenomenon whereby two or more transit vehicles (such as buses or trains) that were scheduled at regular intervals along a common route instead bunch together and form a platoon.
After revision: Graphs of distance s vs time t illustrating bus-bunching:1 Ideal journey2 Bus B delayed by traffic congestion3 B delayed by picking up passengers meant for C4 C is early as B has picked up its passengers5 Bus-bunchingTwo buses together on the same route In public transport, bus bunching, clumping, convoying, piggybacking or platooning is a phenomenon whereby two or more transit vehicles (such as buses or trains) that were scheduled at regular intervals along a common route instead bunch together and form a platoon.