Mass. Gen. Laws ch. 90K, § 6
An enforcing authority may only recover costs reasonably related to the implementation and operation of any bus mounted or bus stop camera system, including, but not limited to, costs associated with: (i) installing, maintaining and operating the bus mounted safety camera system; (ii) issuing notices of camera enforceable violations; (iii) holding hearings for appeals of camera enforceable violations; (iv) notifying the registrar of a failure to pay a fine under this chapter; and (v) collecting a fine; provided, however, that net revenues collected by an enforcing authority pursuant to this chapter shall be deposited in the Massachusetts Transportation Trust Fund established in section 4 of chapter 6C.