pickups and passenger vans the intended parking space can be any space that fits the motor vehicle to be parked with a given alignment plus space parallel to the aligned vehicle and outside the motor vehicle width where a projection line of light according to the invention can reasonably provide assistance in aligning the vehicle for the purposes of this application motor vehicle width for vehicles having two front tires is the width from the outside edges of the two front tires a significant segment of a 2004 vehicle class is about 40 or more or if 40 do not fall within other qualifications set forth in the context a fraction within 10 of the highest fraction that would meet those other qualifications e g if 0 35 of such vehicles met the qualifications a significant segment would be 0 35 minus 0 1 u00d7 0 35 0 35 u2212 0 035 0 315 publications and references including but not limited to patents and patent applications cited in this specification are herein incorporated by reference in their entirety in the entire portion cited as if each individual publication or reference were specifically and individually indicated to be incorporated by reference herein as being fully set forth any patent application to which this application claims priority is also incorporated by reference herein in the manner described above for publications and references while this invention has been described with an emphasis upon preferred embodiments it will be obvious to those of ordinary skill in the art that variations in the preferred devices and.