Maryland Code, General Provisions § 4-326

(b) Except as provided in subsections (c) and (d) of this section, a custodian of captured plate data collected by an automatic license plate reader system shall deny inspection of the captured plate data.

(c) A custodian may use or share captured plate data in the course of the custodian's duties as authorized under § 3-509 of the Public Safety Article.

(d) Subsection (b) of this section does not apply to an electronic toll collection system or associated transaction system operated by or in conjunction with the Maryland Transportation Authority.