Miscellaneous (not strictly rapid transit) timelines:

High speed rail in Asia and Europe, 1965-2015
sample Asia HSR map sample Europe HSR map

Regional passenger rail timelines, 1835-2010:
Northeast US
sample Northeast passenger rail map
California
sample California passenger rail map
City rail and trolleybus timelines, 1840-2010:
Boston
sample Boston rail & trolleybus map
San Francisco
sample San Francisco rail & trolleybus map

New York trolley abandonment,
1932-1957
sample New York trolley map
Hurricane Sandy rapid transit recovery,
October 2012-June 2013
sample Hurricane Sandy map
Nonstop flights from New York,
1930-2010
sample New York nonstop flight map

Other maps:

Scale comparison of selected streetcar systems, 2018
Houston Melbourne New Orleans
Portland San Francisco Toronto
Scale comparison of selected walled cities, 500 BCE-1800 CE
Alexandria 100 BCE Rome 300 CE Constantinope 500 CE
Paris 1400 CE Beijing 1500 CE Tenochtitlan 1500 CE
Google maps: Google charts:
All passenger rail lines in OpenStreetMap

Note: above maps not all at same scale.

See also: historical rapid transit timelines, 1840-2015

By Alexander Rapp based on map data CC-BY-SA by OpenStreetMap and Wikimedia contributors and historical sources.