RE: Chases and other interactions that don't come down to tactical, I'd suggest doing opposed skill checks, 4ed skill challenges, opposed percentile with ad hoc bonuses, you name it. You can choose more random routes or put it in the favor of the players (usually) with skill challenges, or make it directly opposed / random with opposing skill checks.<br/><br/>Or whatever else you want to do.<br/><br/>That way you don't have to get into the tactical / micromanagement of it, anyway. :3