A method for at least slowing a vehicle moving along a surface, the method
comprising: providing first and second panels rotatably disposed on the
surface and capable of extending above the surface, wherein each of the
first and second panels rotate in a different and opposite direction;
providing at least one center panel disposed between the first and second
panels, the center panel being capable of being deployed into a position
extended from the surface; detecting at least one of a vehicle speed,
vehicle type, and vehicle weight; and controlling one or more of the
first, second, and center panels based on the detecting.