A grand union is a rail track junction where two double-track railway lines cross at grade, often in a street intersection or crossroads. A total of sixteen railroad switches (sets of points) allow streetcars (or in more rare installations, trains) coming from any direction to take any of the three other directions. The same effect maybe achieved with two consequent wyes if the location allows for space.
Read more about Grand Union: Complexity, Three-Quarter, Half, and Butterfly Unions, Examples
Famous quotes containing the words grand and/or union:
“The grand Perhaps! We look on helplessly,
There the old misgivings, crooked questions are.”
—Robert Browning (1812–1889)
“We hope the day will soon come when every girl will be a member of a great Union of Unmarried Women, pledged to refuse an offer of marriage from any man who is not an advocate of their emancipation.”
—Tennessee Claflin (1846–1923)