Work cat: Chicago transit map : showing Chicago Transit Authority Lines ... street car, motor bus, trolley bus, elevated and subway ... and connecting suburban bus routes, 1953.

Wu, H.-Y., Niedermann, B., Takahashi, S., Roberts, M.J. and Nöllenburg, M. (2020), A Survey on Transit Map Layout -- from Design, Machine, and Human Perspectives. Computer Graphics Forum, 39: 619-646, on Wiley Online Library (A transit map is a representation of a public transportation network focusing on the connectivity of stations via transit lines, such as railway networks, bus lines, and ferry routes. Among these examples, metro maps, subway maps, or tube maps are typical transit maps of metropolitan railways.) https://doi.org/10.1111/cgf.14030

Transit maps of the world, 2015.

OCLC, Oct. 31, 2022 (in titles: transit map; metro maps, tube map, subway map; bus map)

Wikipedia, viewed Oct. 31, 2022 (A transit map is a topological map in the form of a schematic diagram used to illustrate the routes and stations within a public transport system--whether this be bus, tram, rapid transit, commuter rail or ferry routes. The main components are color-coded lines to indicate each route or service, with named icons to indicate stations or stops)

Established March 2023.