Level 1: Walk.
Level 13/14:Power Walk
Level 25: Slight Jog
They also put a quick travel system that doesn't get you entirely where you want to be, but it gets you in a decent distance to walk to. Then they slap you in the face with a ridiculous 30 minute cool down on the only real way to travel. The taxi system would be fine if you didn't have to walk 10 minutes to an objective (not including the time required to do the objective) and 10 minutes back. I will end up using my quick travel after I spend 20 minutes getting deep into some area and I'll go do another quest and spend 30 minutes simply walking(again doesn't include time actually playing the game).