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  2. Blockage discount - Wikipedia

    en.wikipedia.org/wiki/Blockage_discount

    Blockage discount is an art-business-related and legal term of art for referring to the money discount assigned to a group of artworks by a single artist when that group of works is to be released to market as a group rather than individually.

  3. Token (railway signalling) - Wikipedia

    en.wikipedia.org/wiki/Token_(railway_signalling)

    Examples of single line tokens: Tablet on left, key token on right. The operation of a bidirectional single track line has the hazard of two trains colliding. The simplest way to prevent such collisions is to have only one train in the section at any given time. Such a system is known as "one-engine-in-steam” (OES) or “one-train working ...

  4. Automatic block signaling - Wikipedia

    en.wikipedia.org/wiki/Automatic_block_signaling

    Automatic block signaling (ABS), spelled automatic block signalling or called track circuit block (TCB [1]) in the UK, is a railroad communications system that consists of a series of signals that divide a railway line into a series of sections, called blocks. The system controls the movement of trains between the blocks using automatic signals.

  5. List of most expensive U.S. public works projects - Wikipedia

    en.wikipedia.org/wiki/List_of_most_expensive_U.S...

    The following list includes projects to build new highways or improve existing ones, including roadways, bridges, and tunnels. It includes only projects that are underway or completed. Additionally, projects with multiple independent segments (e.g., I-69 Indiana-Texas Extension , Trans-Texas Corridor ) are not included, though individual ...

  6. Sanitary sewer overflow - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer_overflow

    The U.S. Environmental Protection Agency (EPA) estimates that at least 23,000 to 75,000 SSO events occur in the United States each year. [1] EPA estimated that upgrading every municipal treatment and collection system to reduce the frequency of overflow events to no more than once every five years would cost about $88 billion as of 2004. [2]

  7. Glossary of rail transport terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_rail_transport...

    Rail transport terms are a form of technical terminology applied to railways. Although many terms are uniform across different nations and companies, they are by no means universal, with differences often originating from parallel development of rail transport systems in different parts of the world, and in the national origins of the engineers and managers who built the inaugural rail ...

  8. Blocking (statistics) - Wikipedia

    en.wikipedia.org/wiki/Blocking_(statistics)

    The explanatory variable is the diet pill and the response variable is the amount of weight loss. Although the sex of the patient is not the main focus of the experiment—the effect of the drug is—it is possible that the sex of the individual will affect the amount of weight lost.

  9. List of blockades - Wikipedia

    en.wikipedia.org/wiki/List_of_blockades

    The list of blockades informs about blockades that were carried out either on land, or in the maritime and air spaces in the effort to defeat opponents through denial of supply, usually to cause military exhaustion and starvation as an economic blockade in addition to restricting movement of enemy troops.