How are cities adapting to accommodate for greater bike use? Cities have always been busy and densely populated. People flock there for work, or the opportunities that come for socialising and entertainment. However, in the modern world, a big population comes with big traffic issues, especially if many people are trying to drive cars. This can be a particular problem in older cities that were never designed to accommodate cars –- narrow streets and one way systems can quickly lead to a build-up.