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In modern usage, civil engineering is a broad field of engineering that deals with the planning, construction, and maintenance of fixed structures as they related to earth, water, or civilization and their processes. Most civil engineering today deals with roads, structures, water supply, sewer, flood control, or traffic.

Engineering has developed from observations of the ways natural and manmade systems react and from the development of empirical equations that provide bases for design. Civil engineering is the broadest of the engineering fields. In fact engineering was once divided into only two fields--military and civil. All the engineering specialties have derived from civil engineering. Civil engineering is still an umbrella field comprised of many related specialities.

1 Sub-disciplines of civil engineering

1.1 General civil engineering

General civil engineering is concerned with the overall interface of fixed projects with the greater world. General civil engineers work closely with surveyors and specialized civil engineers to fit and serve fixed projects within their given site, community and terrain by designing grading, drainage (flood control), paving, water supply, sewer service, electric and communications supply and land (real property) divisions. General engineers spend much of their time visiting project sites, developing community/neighborhood consensus, and preparing construction plans.

1.2 Structural engineering

Structural engineering is concerned with the design of bridges, buildings, offshore oil platforms, dams etc. Structural design and structural analysisSee also: structuralism. Structural analysis is the mathematical calculation of forces, stresses, and deflections within structures, either as part of the design of those structures or as a tool in understanding the performance of existing structures. are components of structural engineering and a key component in the structural design process.

This involves computing the stresses and forces at work within a structure. There are some structural engineers who work in non-typical areas, designing aircraft, spacecraft and even biomedical devices.

1.3 Geotechnical engineering

Supporting structural engineering is the field of geotechnical engineeringGeotechnical engineering is concerned with the engineering properties of earth materials. Geotechnical engineers work with data from soil and rock samples to specify the requirements for man-made structures and earthworks that will be built on a site.. The importance of geotechnical engineering can hardly be overstated: buildings must be connected to the ground. Geotechnical engineeringGeotechnical engineering is concerned with the engineering properties of earth materials. Geotechnical engineers work with data from soil and rock samples to specify the requirements for man-made structures and earthworks that will be built on a site. is concerned with soil properties, foundations, footings, soil-structure interaction and soil dynamics.

1.4 Transportation engineering

Transportation engineering is concerned with queueing theoryQueueing theory (spelled queuing theory in the United States) is the mathematical study of waiting lines (or queues). There are several related processes, arriving at the back of the queue, waiting in the queue (essentially a storage process), and being s and traffic flow planning, roadway geometric design and driver behavior patterns. Simulation of traffic operation is performed through use of trip generation, traffic assignment algorithms which can be highly complex computational problems.

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