In the Maliki school travel is divided into two parts: the movement and the arrival. For the movement, the actual act of traveling it begins when you leave your city limits and ends whenever you arrive, no matter how many days. You can shorten and combine. This is called sayr and the person is called sa'ir.
The second part of travel is the arrival to the new location. He or she can shorten only, not combine, if their intent is to stay less than four days or twenty prayers. Then he is considered muqim, or resident, regarding prayer. The distance is forty-eight miles at the time of the Salaf, which in English miles is thirty-six.
If he gets up and moves around again, such as someone touring city to city to city, he starts his four days over every time he arrives at a new city.