X hits on this document

149 views

0 shares

0 downloads

0 comments

17 / 56

TRANSPORTATION RESEARCH DIGEST

ARIZONA TRANSPORTATION INSTITUTE

e-mail jsemmens@cox.net

NOVEMBER 2005

The most applicable structural BMPs for use along Montana's highways seem to be dry ponds, wet ponds, wet extended detention ponds, constructed wetlands, vegetated swales, and vegetated filter strips. It is mainly because of their resistance to freezing conditions and their ability to effectively trap suspended solids, yet they may need protection from and additional storage for heavy flows and high sediment loads. In certain situations, under specific site conditions, other BMPs such as sand filters or infiltration trenches may be applicable; however, their use is limited in Montana and may require excessive modifications at high costs.

Non-structural BMPs have the added benefit of potential cost savings in winter maintenance activities; however, they often require an initial investment in new technology. Non-structural BMPs are rapidly evolving as new technologies are developed, and keeping track of these technologies will require a continuous effort.

Anti-icing, Road Weather Information Systems (RWIS), and the Maintenance Decision Support System (MDSS) in conjunction with advanced snowplow technologies are expected to provide the most efficient use of traction materials on winter roadways in Montana. With further testing, the anti-icing smart overlay technology may reduce or eliminate the dependence on accurate weather forecasting for anti-icing operations, and it is potentially highly useful for bridges that require more frequent anti-icing or de-icing than the associated roadway.

domain of technology, management, or both. Strategies may vary, depending on the specific climate, site, and traffic conditions. The crux is selecting an appropriate suite of BMPs that can function most effectively for a given set of conditions.

Document info
Document views149
Page views149
Page last viewedSat Dec 10 14:55:12 UTC 2016
Pages56
Paragraphs959
Words19604

Comments