Box 1.
Baltimore Gas and Electric
Maritime
Canals
Coastal trade
Harbor
Port of Baltimore
Tidewater trade
Transatlantic trade
Mass Transit
Administration
Bus Tokens
Streetcars
Streetcar Rail Mail
Rail
Baltimore & Annapolis Railroad
Baltimore & Ohio Railroad
Canton Company Railroad
Catonsville Railroad
Chapel Cars
Inter-modal Containers
Marine Terminal
Northern Central
Safety
Stations & Structures
Strikes
Roads & Motor Vehicles
Bridges
Expressways
General
National Pike (US-40)
Traffic Control
Waste & Water
City Springs
Sewage System
Trash Removal