I take a sketch book everywhere and frequently sketch people.  A bus journey is particularly good for this as the model tends to sit still on one seat.     The Daily Journeys includes bus passengers in the morning  and afternoon and illustrates the difference a day has made to them.   I am not the only person to do bus journeys, see examples by Boris Johnson and Oscar Murillo. For details of the passengers on my bus see.  Young Girls    Yoga Woman    Fashionable Woman

























Even Boris got into the act









Similar idea from Oscar-murillo