railroad sighting

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• Rail transport — Railroad and Railway both redirect here. For other uses, see Railroad (disambiguation). Rail transport is the conveyance of passengers and goods by means of wheeled vehicles specially designed to run along railways or railroads. Rail transport is …   Wikipedia

• Railway signalling — Not to be confused with Railway signal. A gantry of British semaphore signals seen from the cab of a steam locomotive Railway signalling is a system used to control railway traffic safely, essentially to prevent trains from colliding. Being… …   Wikipedia

• Railway signal — Not to be confused with Railway signalling. A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers. The driver interprets the signal s… …   Wikipedia

• Norden bombsight — The Norden bombsight at the Computer History Museum in Mountain View, California. This example does not have the associated autopilot attached …   Wikipedia

• Beijing city fortifications — The city wall of Beijing was a fortification built around 1435. It was 23.5 km long. The thickness at ground level was 20m and the top 12m. The wall was 15m high, and it had nine gates. This wall stood for nearly 530 years, but in 1965 it was… …   Wikipedia

• Hoosac Tunnel — The Hoosac Tunnel (also called Hoosic or Hoosick Tunnel) is a 4.75 mile long (7.64 km) railroad tunnel in western Massachusetts which passes through the Hoosac Range, an extension of Vermont s Green Mountains.The tunnel s east portal is in… …   Wikipedia

• Panama Railway — Infobox rail railroad name = Panama Canal Railway Company logo filename = PCRC Logo.jpg logo size = 150 system map size = 300 marks = PCRC locale = Along the Panama Canal, through the cities of Colón and Panama start year = 1855 end year =… …   Wikipedia

• Heliograph — A Heliograph (from the Greek helios (Lang el| Ἥλιος), meaning sun , and (γραφειν) = write) is a wireless solar telegraph that signals using Morse code flashes of sunlight reflected by a mirror. The flashes are produced by momentarily pivoting the …   Wikipedia

• Centralized traffic control — (CTC) is a signalling system used by railroads. The system consists of a centralized train dispatcher s office that controls railroad switches in the CTC territory and the signals that railroad engineers must obey in order to keep the traffic… …   Wikipedia

• List of California Historical Landmarks — This is a list of California Historical Landmarks. The official list may be seen [http://ohp.parks.ca.gov/listed resources/?view=all here] . NOTOC · =Alameda County= For more details, please see http://ohp.parks.ca.gov/default.asp?page id=21388.… …   Wikipedia

• Cape Cod — This article is about the area of Massachusetts. For other uses, see Cape Cod (disambiguation). For other uses, see Cod (disambiguation). Coordinates: 41°41′20″N 70°17′49″W /  …   Wikipedia