Normally, each town within a ConnectedCity is a distinct entity, separated from the others by the rural hinterland. However, where towns coalesced before World War II, the ConnectedCities methodology treats them as separate towns.
Large ConnectedCities tend to have several rail routes converging on the hub town. Their population can vary from around 50,000 to over a million. Some are based on existing cities such as Sheffield or Canterbury, while others have large towns as their hub, eg. Colchester or Crewe.
Small ConnectedCities are often linear, with their hub town and connected towns along a single railway. Their population can be as low as 20,000 but at the higher end they approach 50,000. Examples of their hub towns are Andover and Sudbury.
Although some connected towns are quite large, they are generally much smaller than the hub town. They all have easy access (within 15 minutes) to the hub town by a frequent rail service.