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PUBLIC TRANSPORTATION:
TYPES OF PUBLIC TRANSPORTATION
Buses
Paratransit
Streetcars
Light-Rail Transit
Heavy-Rail Transit
Commuter Rail Transit
Automated Guided Transit
Ferries
DEVELOPMENT OF PUBLIC TRANSPORTATION IN THE UNITED STATES
HISTORY

AUTOMOBILE:
POWER SYSTEM
Engine
Engine Types
Fuel Supply
Exhaust System
Cooling and Heating System
DRIVETRAIN
Transmission
Front- and Rear-Wheel Drive
SUPPORT SYSTEMS
Suspension System
Wheels and Tires
CONTROL SYSTEMS
Steering
Brakes
ELECTRICAL SYSTEM
Ignition System
SAFETY FEATURES
HISTORY
Automobiles Through the Years
Internal-Combustion Engine
Early Electric Cars
AUTOMOBILES IN THE 20TH CENTURY
NEW TECHNOLOGIES

AUTOMOBILE INDUSTRY:
ECONOMIC IMPORTANCE
Domestic Impact
Foreign Trade
HOW CARS ARE BUILT
Research, Design, and Development
Manufacturing and Assembly
Sales and Service
Customer Feedback
HISTORY OF THE AUTOMOBILE INDUSTRY
Early Automobile Concepts
Henry Ford and Mass Production
Other Automakers
The Great Depression of the 1930s
Labor Unions and Strikes
Wartime Production
Postwar Production
Automobile Safety
Foreign Imports and the Energy Crisis
The 1980s and 1990s
FUTURE AUTOMOBILE INDUSTRY TRENDS
Computerization
Alternative Fuel Research
Materials and Safety


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Streetcars


A pair of streetcars pass each other in Munich, Germany. Electric streetcars provide urban public transportation for many residents of large cities. Although streetcar use in the United States declined dramatically in the 1930s and 1940s in favor of buses, streetcars remain popular in many European cities.


One of the cultural symbols of Melbourne, Australia, a green and yellow tram glides along on rails in the city. The city’s extensive network of tramways has expanded to include commuter lines to the suburbs. In a preservation act that attests to the importance of the trams in Melbourne’s cultural life, the National Trust classified some older trams as having historical significance.

Streetcars, also known as tramways or trolleys, are electrically powered vehicles that run on steel tracks embedded within city streets. Power for these electric vehicles is received from overhead wires, as in the case of trolley buses. Streetcars can operate as single units or in short trains of two or three cars. Streetcars often have to contend with traffic, usually resulting in slow service. A cable car is a type of streetcar that is pulled along by a cable running under the street. The only remaining cable car system in operation in the United States is in San Francisco, California.

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TRUCK:
LIGHT TRUCKS
MEDIUM TRUCKS
HEAVY TRUCKS
TRAILERS
TRUCKING OPERATIONS AND REGULATIONS
HISTORY

ROAD:
TYPES OF ROADS
Highways
Urban Streets
Rural Roads
ROADWAY ENGINEERING
Roadbed
Base Course
Wearing Course
Bituminous Pavement
Concrete Pavement
ROAD PLANNING AND ADMINISTRATION
HISTORY OF ROAD CONSTRUCTION