  The focus of this paper is to propose a driver model that incorporates human
reasoning levels as actions during interactions with other drivers. Different
from earlier work using game theoretical human reasoning levels, we propose a
dynamic approach, where the actions are the levels themselves, instead of
conventional driving actions such as accelerating or braking. This results in a
dynamic behavior, where the agent adapts to its environment by exploiting
different behavior models as available moves to choose from, depending on the
requirements of the traffic situation. The bounded rationality assumption is
preserved since the selectable strategies are designed by adhering to the fact
that humans are cognitively limited in their understanding and decision making.
Using a highway merging scenario, it is demonstrated that the proposed dynamic
approach produces more realistic outcomes compared to the conventional method
that employs fixed human reasoning levels.
