Infrastructure assets categorized by function

Infrastructure typically refers to the technical structures that support a society, such as roads, water supply, wastewater, power grids, flood management systems, telecommunications and so on. Most of these systems are typically owned and managed by governments or public utility companies. How to categorize infrastructures?

Transportation infrastructure:

• Road and highway networks, including structures (bridges, tunnels, culverts, retaining walls), signage and markings, electrical systems (street lighting and traffic lights) and edge treatements (curbs, sidewalks, landscaping).
  
• Railways, including structures, terminal facilities (railyards, trains stations), level crossings, signaling and communications systems.
  
• Canals and navigable waterways requiring continuous maintenance (dredging, etc.).
  
• Seaports and coastal navigation systems.
  
• Airports, including air navigational systems.
  
• Mass transit systems (commuter rail systems, subways, tramways, trolleys).
  
• Bicycle paths and pedestrian walkways.
  

Energy infrastructure:

• Electrical power network, including generation plants, electric grid, substations and local distribution.
  
• Natural gas pipelines, storage and distribution terminals, as well as the local distribution network.
  
• Steam production and distribution networks for district heating systems.
  

Water management infrastructure:

• Drinking water supply, including the system of pipes, pumps, valves and filtration and treatment equipment, including buildings and structures to house the equipment, used for the collection, treatment and distribution of drinking water.
  
• Sewage collection and disposal.
  
• Drainage systems (sewers, ditches, etc.).
  
• Major irrigation systems (reservoirs, irrigation canals).
  
• Major flood control systems (dikes, leeves, major pumping stations and floodgates).
  

Communications infrastructure:

• Telephone networks (land lines) including switching systems.
  
• Cellular phone networks.
  
• The portion of cable televisions networks including receiving stations and cable distribution networks.
  
• The portion of internet systems including high-speed data cables, routers and servers.
  
• Communications satellites and underseas cable.
  
• Private or dedicated telecommunications networks (such as those used for internal communication and monitoring by major infrastructure companies, by governments, by the military or by emergency services).

(Source: Wikipedia)