Chapter 90 of the Massachusetts General Laws is hereby amended by inserting the following section after section 18A:-  

"Section 18B.  No motor vehicle checkpoint which targets a particular type of motor vehicle, decoration or adornment of the vehicle or rider, shall be conducted within the Commonwealth of Massachusetts. This section shall apply only to motor vehicle safety checkpoints targeting the general public who are being conveyed by a Motor Vehicle as defined in Chapter 90 Section 1, and shall not apply to any motor vehicle used as a public or common carrier of persons or property, or to any trackless trolley, semi-trailer, tandem unit, or low-speed motor vehicle as defined in Chapter 90 Section 1 for the purposes of conveying construction or commercial goods, or a motor vehicle which exceeds the dimensional or weight limits imposed by sections nineteen and nineteen A of this chapter or by sections thirty or thirty A of chapter eighty-five."