On the great map, you will find it required that your move your characters around. To prevent you from going from South to North in a single day, these rules has been made. In the first days you might still be able to walk from South to North in a few days, but as the holdings clutters the map, it might take 2 irl weeks.
As holdings are built, roads will be built between them. These roads takes one day to travel(including resting time), no matter how long the road is. This means that it gives for rp to happen while you're resting at a holding.
You can still have a walk take longer time if you want. Just not faster than the one day.