Definitions for positive train control
pos·i·tive train con·trol

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1. Positive train control

   Positive train control (PTC) is a system of functional requirements for monitoring and controlling train movements and is a type of train protection system. The term stems from control engineering. The train is only allowed to move in case of positive movement allowance. It generally improves the safety of railway traffic. Train protection systems are used to control traffic movement by technical means. They are especially needed in cases of high speed transportation, dense traffic with short succession of trains and mixed type traffic at widely differing speeds. Train protection systems were in practical testing at least since the beginning of the 1930s in Europe. Stopping a running train is the main goal of any train protection system. This is most easily done with stop order, and without a special order the vehicle is allowed to run. A typical representative for this "negative train control" is Indusi. In contrast to this 'easy moving', a PTC restricts the train movement to an explicit allowance; movement is halted upon invalidation. The main concept of PTC (as defined for North American Class I freight railroads) is that the train receives information about its location and where it is allowed to safely travel, also known as movement authorities. Equipment on board the train then enforces this, preventing unsafe movement. PTC systems may work in either dark territory or signaled territory, and may use GPS navigation to track train movements. Various other benefits are sometimes associated with PTC such as increased fuel efficiency or locomotive diagnostics; these are benefits that can be achieved by having a wireless data system to transmit the information, whether it be for PTC or other applications. The Federal Railroad Administration (FRA) has listed among its goals, "To deploy the Nationwide Differential Global Positioning System (NDGPS) as a nationwide, uniform, and continuous positioning system, suitable for train control." The U.S. freight rail industry had said that at the end of 2018, the nation's largest freight railroads were operating PTC across 83.2 percent of the required route miles. The American Railway Engineering and Maintenance-of-Way Association (AREMA) describes Positive Train Control as having these primary characteristics: Train separation or collision avoidance Line speed enforcement Temporary speed restrictions Rail worker wayside safety

How to pronounce positive train control?

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Numerology

1. Chaldean Numerology

   The numerical value of positive train control in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of positive train control in Pythagorean Numerology is: 4

Examples of positive train control in a Sentence

1. The NTSB:

   I think what we need to know, we need the traveling public to know that the NTSB is conducting a very thorough investigation, and we will get to the bottom on this, and we have to have positive train control implemented soon to keep things like this from happening in the future.

2. Chuck Schumer:

   Experts have made clear that Positive Train Control could have prevented the tragedy in Philadelphia, it is simply a fact that insufficient funding for Amtrak has delayed the installation of PTC, and to deny a connection between the accident and underfunding Amtrak is to deny reality.

3. Cory Booker:

   We have trillions of dollars in infrastructure debt and the accident the NTSB says could have been prevented if we had positive train control.

4. Patrick Warren:

   We continue to closely monitor railroads’ progress implementing Positive Train Control, with less than two years remaining to complete the implementation process, it is imperative that railroads continue to meet implementation milestones.

5. Frederick Hill:

   The administration requested authority to extend the deadline for positive train control and the Senate subsequently advanced a bipartisan proposal to create accountability and set realistic deadlines, this provision in the surface transportation bill will address the concerns summarized in Chairman Elliott's correspondence.

References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Positive_Train_Control