  In this paper, we outline an approach for automatic generation of challenging
road networks for virtual testing of an automated lane keep system. Based on a
set of control points, we construct a parametric curve that represents a road
network, which defines the dynamic driving task an automated lane keep system
equipped vehicle has to perform. Changing control points has global influence
on the resulting road geometry. Our approach uses search to find a set of
control points that results in a challenging road geometry, eventually forcing
the vehicle to leave the intended path. We evaluated our approach in three
different search-configurations regarding test efficiency and practical
applicability for automatic virtual testing of an automated lane keep system.
