Lankford Highway tag cleanup, primarily moving the official name to official_name, and setting name="Lankford Highway".

Downgrade CBBT to highway=trunk+expressway=yes. Both tunnels are undivided two lane roads, and there are multiple points where there is a lack of controlled access (see intersection on Fishermans Island, and the RIROs on South Thimble Island).

Clean up southern end of CBBT.

Clean up second, under-construction Thimble Shoal Tunnel.

Clean up CBBT relations, including the outlines of the constituent bridges/tunnels.

CBBT tag cleanup.

Chesapeake Bay Bridge–Tunnel naming. Use official_name for the official name, and use bridge:name/tunnel:name for the names of the constituent bridges & tunnels.

Fix nonstandard value in abandoned:railway.

Fix nonstandard value in abandoned:railway.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Make road classification more consistent.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.

Remove redundant railway:historic tag.

Use lifecycle prefixes for abandoned, razed, and dismantled railways that already have historic:railway or railway:historic.