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  2. Overpass - Wikipedia

    en.wikipedia.org/wiki/Overpass

    An overpass, called an overbridge or flyover (for a road only) in the United Kingdom and some other Commonwealth countries, is a bridge, road, railway or similar structure that is over another road or railway. An overpass and underpass together form a grade separation. [1] Stack interchanges are made up of several overpasses.

  3. Mount Hood Freeway - Wikipedia

    en.wikipedia.org/wiki/Mount_Hood_Freeway

    In 1962, this section was formally submitted for inclusion in the U.S. Interstate Highway System as part of Interstate 80N, today's I-84. [citation needed] I-205 was in the planning stages at the time the Mount Hood Freeway was first proposed. The I-205 routing was originally envisioned for the 52nd Avenue corridor, but ended up being built ...

  4. Grade separation - Wikipedia

    en.wikipedia.org/wiki/Grade_separation

    The ring road of Coventry, England, is a notorious example, as are parts of the southern M25, the London orbital motorway, the M6/M5 junction north-west of Birmingham, and the A4/M5 junction west of Bristol. Weaving can often cause side-on collisions on very fast roads with top speeds of up to 200 kilometres per hour, as well as the problem of ...

  5. Clearance (civil engineering) - Wikipedia

    en.wikipedia.org/wiki/Clearance_(civil_engineering)

    In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.

  6. Linear referencing - Wikipedia

    en.wikipedia.org/wiki/Linear_referencing

    A station number written on a silt fence at a construction site. Linear referencing, also called linear reference system or linear referencing system (LRS), is a method of spatial referencing in engineering and construction, in which the locations of physical features along a linear element are described in terms of measurements from a fixed point, such as a milestone along a road.

  7. Freeway lid - Wikipedia

    en.wikipedia.org/wiki/Freeway_lid

    A freeway lid (also known as a lidded freeway, freeway cap, highway cap or highway deck) is a type of deck bridge built on top of a controlled-access highway or other roadway. It is commonly used to create new parkland in urban areas, but can also be used to house buildings or other heavy structures like convention centers .

  8. List of gaps in Interstate Highways - Wikipedia

    en.wikipedia.org/wiki/List_of_gaps_in_Interstate...

    There are gaps in the Interstate Highway System where the roadway carrying an Interstate shield does not conform to the standards set by the Federal Highway Administration (FHWA), the body that sets the regulations for the Interstate Highway System. For the most part, the Interstate Highway System in the United States is a connected system ...

  9. Roundabout interchange - Wikipedia

    en.wikipedia.org/wiki/Roundabout_interchange

    A roundabout interchange is a type of interchange between a controlled access highway, such as a motorway or freeway, and a minor road. The slip roads to and from the motorway carriageways converge at a single roundabout , which is grade-separated from the motorway lanes with bridges.