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The location of the State of Colorado in the United States of America.. This is a list of bridges and tunnels on the National Register of Historic Places in the U.S. state of Colorado.
See three-way junction 5-1-1 A transportation and traffic information telephone hotline in some regions of the United States and Canada that was initially designated for road weather information. A Access road See frontage road Advisory speed limit A speed recommendation by a governing body. All-way stop or four-way stop An intersection system where traffic approaching it from all directions ...
It brings Colorado State Highway 119 over Boulder Creek, and was under Federal rather than state management as the highway provides access from Boulder to the Roosevelt National Forest. [2] It was designed by the U.S. Bureau of Public Roads. [3] It is 100 feet (30 m) in total length, and 39 feet (12 m) wide carrying a 34 feet (10 m)-wide roadbed.
Location of Boulder County in Colorado. This is a list of the National Register of Historic Places listings in Boulder County, Colorado. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Boulder County, Colorado, United States. The locations of National Register properties and ...
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The Boulder Bridge is a historic bridge located in the Washington, D.C. portion of Rock Creek Park, an urban national park listed on the National Register of Historic Places. Boulder Bridge was constructed in 1902 and carries Beach Drive across Rock Creek , a tributary of the Potomac River .
In some cases, a circumferential route is formed by the combination of a major through highway and a similar-quality loop route that extends out from the parent road, later reconnecting with the same highway. Such loops not only function as a bypass for through traffic, but also to serve outlying suburbs. In the United States, an Interstate ...
A spiral bridge, loop bridge, helix bridge, or pigtail bridge is a road bridge which loops over its own road, allowing the road to climb rapidly. This is useful in steep terrain, or where the approach road to a bridge would terminate too far from the bridge's end. Despite its name, the typical shape of a spiral bridge forms a helix, not a spiral.