Tex. Transp. Code § 545.201
(a) An operator may not pass to the left or drive on the left side of a streetcar moving in the same direction, even if the streetcar is temporarily at rest, unless the operator:
(b) An operator when lawfully passing to the left of a streetcar that has stopped to receive or discharge a passenger:
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.