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  2. Track Warrant Control - Wikipedia

    en.wikipedia.org/wiki/Track_Warrant_Control

    Track warrants are issued granting main track use between two named points (i.e. milepost sign, station, or any fixed physical point, such as a switch).The dispatcher may also issue time constraints (known as "Box 6" on a standard form), although the track warrants remain in effect until cleared by a member of the receiving crew.

  3. North American railroad signaling - Wikipedia

    en.wikipedia.org/wiki/North_American_railroad...

    Track Warrant Control In Track Warrant Control, or TWC, the train dispatcher issues "track warrants" via radio that authorize the train between two specified limits. The limits are often mileposts or stations. The track warrant may authorize a train to proceed to a station and "clear the main" or enter a siding so an oncoming train can pass.

  4. Glossary of North American railway terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_North_American...

    Track warrant (TWC) (US) or occupancy control system (OCS) (CA) A system for authorizing main track occupancy using defined points such as mileposts, switches, or stations [236] Train order (US) A system for authorizing main track occupancy using telephone, telegraph, and wayside stations to pass authority to train crews Triclops

  5. Train order operation - Wikipedia

    en.wikipedia.org/wiki/Train_order_operation

    Train order operation was widely used by the railroads of North America before the days of centralized traffic control (CTC), direct traffic control (DTC), and the use of track warrants conveyed by radio. The system used a set of rules when direct communication between train dispatchers and trains was limited or non-existent.

  6. Signalling block system - Wikipedia

    en.wikipedia.org/wiki/Signalling_block_system

    The basic principle is that a track is broken up into a series of sections or "blocks". Only one train may occupy a block at a time, [citation needed] and the blocks are sized to allow a train to stop within them. [1] That ensures that a train always has time to stop before getting dangerously close to another train on the same line.

  7. In Texas, can police search my cellphone when they pull me ...

    www.aol.com/texas-police-search-cellphone-pull...

    The Texas Constitution says: “The people shall be secure in their persons, houses, papers and possessions, from all unreasonable seizures or searches, and no warrant to search any place, or to ...

  8. Targeted immigration enforcement efforts underway in Chicago

    www.aol.com/top-doj-official-chicago-sunday...

    CHICAGO (CBS) — Targeted immigration enforcement operations by multiple agencies were launched in Chicago Sunday, with top Trump administration officials in the city to oversee the operation.

  9. Positive train control - Wikipedia

    en.wikipedia.org/wiki/Positive_train_control

    The wireless method has proven most successful on low density, unsignaled dark territory normally controlled via track warrants, where speeds are already low and interruptions in the wireless connection to the train do not tend to compromise safety or train operations.

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