Check out the special edition of the Journal of Open Access to Law, "Communicating the law and public information to vulnerable audiences" [JOAL Vol. 9 No. 1 (2021)] for a special paper from Barbra and Amreeta S. Mathai of the American Civil Liberties Union.
In this paper "Giving Notice": The Divergence Between Legal and Practical Assessments of How Well Government Notices Provide Information to Vulnerable Audiences, they discuss the practice of "revoking or suspending the driver’s licenses for failure to pay traffic tickets without first providing them adequate notice of how to prevent or contest the suspension..."
For more of Dr. Barbra Kingsley's writings on this topic, refer to her declaration in an ACLU case in South Carolina.