I put in a new link category of what I think are the best web recourses for MD bike safety: https://www.baltimorespokes.org/links/index.php?category=Must+read+for+bike+safety
In addition I would like to highlight Safe Bicycling in Maryland handbook. You can get a copy by following the instructions on this page: https://www.sha.state.md.us/exploremd/bicyclists/oppe/Pamphlets/Bicyclists1.asp
Montgomery County has a photo copy of it on line: https://www.montgomerycountymd.gov/content/dpwt/capital/pedbike/Datafiles/mdsafety.pdf
Biking in Baltimore