Disclosed herein is an imaging lens. A thrust force applied to a face of the cassette that faces toward the front when mounted in the vehicle causes the cassette element to separate from the frame element. A collet arm coupler is threadedly received into the external end of the ram. A correlation coefficient is recursively computed from the lane information from the two lane sensing systems and used to calculate a state of health of the lane management system. The rotatable mounting ring is interlocked with fixed mounting ring to enable rotation of the rotatable mounting ring, for example, by way of a tongue and groove arrangement with respect to the fixed mounting ring. The hydraulic system can be configured and arranged to supplement power provided by the power source to the drive wheel.