Improving Colorado Mountain Highway Culvert Stream Crossings for Trout Passage

Highways can be effective barriers to animal migration. Where highways cross over streams, a passageway, typically a culvert, not designed for fish access can cut off an organism from miles of habitat. Traditional methods of culvert design, to convey floodwaters, reduced access to aquatic and riparian range. The Colorado Department of Transportation likely has numerous culverts that restrict aquatic passage. This paper provides guidance to CDOT for assessment of stream geomorphic conditions affecting culvert performance for fish passage, understanding aquatic organism habitat requirements, and incorporating ecological parameters into culvert designs that benefit fish and other organisms. A case study illustrates culvert problems in a difficult geomorphic setting including a fish passage assessment to evaluate stream stability for long-term culvert reliability.

Developing a Citizen Volunteer Lake Monitoring Program for the Flathead Basin in Northwestern Montana for the early Detection and Prevention of the Introduction of Zebra Mussels and other Aquatic Invasive Species (AIS)

Preventing the introduction of aquatic invasive species (AIS) like zebra and quagga mussels in the U.S. is a high priority. This Capstone demonstrates zebra and quagga mussels are of concern as aquatic invasive species and a volunteer monitoring and intervention program is an effective means for early detection of AIS. This Capstone developed an AIS citizen volunteer lake monitoring program consistent with other programs concerned about AIS prevention and early detection. This Capstone concludes implementing such a voluntary program will help reduce the spread of zebra and quagga mussels and will provide early detection information to appropriate agencies empowered with response actions if species are found.

Efficient sampling of band-limited signals from sine wave crossings

This correspondence presents an efficient method for reconstructing a band-limited signal in the discrete domain from its crossings with a sine wave. The method makes it possible to design A/D converters that only deliver the crossing timings, which are then used to interpolate the input signal at arbitrary instants. Potentially, it may allow for reductions in power consumption and complexity in these converters. The reconstruction in the discrete domain is based on a recently-proposed modification of the Lagrange interpolator, which is readily implementable with linear complexity and efficiently, given that it re-uses known schemes for variable fractional-delay (VFD) filters. As a spin-off, the method allows one to perform spectral analysis from sine wave crossings with the complexity of the FFT. Finally, the results in the correspondence are validated in several numerical examples.

Electricity infrastructure: more border crossings or a borderless Europe? Bruegel Policy Contribution 2013/05, February 2013

Being able to transport electricity seamlessly across borders is essential for achieving three major European Union energy policy goals: (1) enabling competition between national energy companies, (2) cost-effective roll-out of renewables,and (3) security of supply. However, neither the market design nor the framework for infrastructure investment proposed by the European Commission is adequate for enabling free flows of electricity within the EU.

Compilation of states' laws and regulations on matters affecting rail-highway crossings. Final report.

Federal Highway Administration, Washington, D.C.

Evaluation of experimental railroad-highway grade crossings in Louisiana. Interim report no. 6.

Mode of access: Internet.

Evaluation of retroreflective markings to increase rail car conspicuity -- safety of highway-railroad grade crossings.

Transportation Systems Center, Cambridge, Mass.

Legal effects of use of innovative equipment at railroad-highway grade crossings on railroad's accident liability. Final report.

Federal Railroad Administration, Office of Safety, Washington, D.C.

Enhancements to passive warning devices at railroad-highway grade crossings.

Texas Department of Transportation, Austin

Summary statistics of the national railroad-highway crossing inventory for public at-grade crossings. Final report.

Federal Railroad Administration, Office of Policy and Program Development, Washington, D.C.

Effectiveness of motorist warning devices at rail-highway crossings. Final report.

Federal Highway Administration, Office of Research, Development and Technology, Washington, D.C.

Safety features of stop signs at rail-highway grade crossings. Volume II. Technical report. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Evaluation of experimental railroad-highway grade crossings in Louisiana. Final report.

Mode of access: Internet.

Field evaluation of innovative active warning devices for use at railroad-highway grade crossings /

"August 1988."

Summary statistics of the National Railroad-Highway Crossing Inventory for public at-grade crossings.

Federal Railroad Administration, Office of Policy and Program Development, Washington, D.C.