The bus may be public transport, but passengers occupy private worlds. Personal space is habitually maintained, and interaction is often non-existent, at other times minimal and purely functional. In this enclosed space, breaching the barrier of another passenger's private world creates a higher sense of tension than it otherwise might. This photographic project documents the private worlds of passengers on the number 79 bus. Sometimes, the boundary of the subject's private space is crossed, and these images are further informative for the subject's response.