Edwin could go anywhere he wanted in the city. It was just a matter of changing the sign in the front window.

Once he got to where the sign said, the whole map of the city was at his disposal, and once he chose a new direction it was totally up to him whether he filled his cabin until the passengers spilled out the doors and dangled dangerously out over the street, or he could simply choose to blow by every poor sap who tried to flag him down from the curb and enjoy the peace and solitude of an empty ride.