A forward-facing sensing system for a vehicle, the vehicle having a windshield, said forward-facing sensing system comprising: a radar sensor device, wherein said radar sensor device has a sensing direction forward of the vehicle; a forward-facing image sensor having a forward field of view through windshield; a control responsive to an output of said radar sensor device and responsive to an output of said forward-facing image sensor; both said radar sensor device and said forward-facing image sensor being disposed within a windshield electronics module that is removably installed within the vehicle cabin at an upper region of the vehicle windshield and that may be removed therefrom as a self-contained unit, such as for service or replacement; characterized by said radar sensor device and said forward-facing image sensor collaborating in a way that enhances the sensing capabilities of the forward-facing sensing system to detect objects present in the path of forward travel of the vehicle by: - the forward-facing sensing system enhancing interrogation of an area in front of the vehicle at which an object is detected by said radar sensor device to determine if the detected object is an object of interest causing a potentially hazardous condition; and - wherein enhancing interrogation of the area at which the object is detected comprises enhanced processing by an image processor of image data captured by said forward-facing image sensor at the area at which the object is detected. a radar sensor device, wherein said radar sensor device has a sensing direction forward of the vehicle; a forward-facing image sensor having a forward field of view through windshield; a control responsive to an output of said radar sensor device and responsive to an output of said forward-facing image sensor; both said radar sensor device and said forward-facing image sensor being disposed within a windshield electronics module that is removably installed within the vehicle cabin at an upper region of the vehicle windshield and that may be removed therefrom as a self-contained unit, such as for service or replacement; characterized by said radar sensor device and said forward-facing image sensor collaborating in a way that enhances the sensing capabilities of the forward-facing sensing system to detect objects present in the path of forward travel of the vehicle by: - the forward-facing sensing system enhancing interrogation of an area in front of the vehicle at which an object is detected by said radar sensor device to determine if the detected object is an object of interest causing a potentially hazardous condition; and - wherein enhancing interrogation of the area at which the object is detected comprises enhanced processing by an image processor of image data captured by said forward-facing image sensor at the area at which the object is detected. - the forward-facing sensing system enhancing interrogation of an area in front of the vehicle at which an object is detected by said radar sensor device to determine if the detected object is an object of interest causing a potentially hazardous condition; and - wherein enhancing interrogation of the area at which the object is detected comprises enhanced processing by an image processor of image data captured by said forward-facing image sensor at the area at which the object is detected.