Download Guidelines for the selection of snow and ice control by Levelton Consultants.; National Cooperative Highway Research PDF

By Levelton Consultants.; National Cooperative Highway Research Program.; American Association of State Highway and Transportation Officials.; United States. Federal Highway Administration.; National Research Council (U.S.). Transportation Research Board

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The act also requires that “critical habitat” (defined by the listing agencies) not be destroyed and requires the agencies to prepare “recovery plans” that set guidelines for an extension of abundance or range of the listed species. Thus, both private and governmental activities may be restricted within the range of a listed species. Although federal water-quality regulations within the United States are not applied to road application materials, with the exception of urban areas where stormwater permits are required, the ESA is directly applicable to such materials, just as it would be to any other major activity that could have environmental effects.

19) determined that compacted soils could result in 75-percent runoff and 25-percent infiltration, while permeable soils could result in 35-percent runoff and 65-percent infiltration. 2 cm in heavy-textured soils (19). , typical farming and pasture) have shown almost no infiltration. These are extremely complex processes. Methods of predicting salt infiltration in frozen soil are not available, and the movement of moisture through soil is not yet fully understood. Novotny et al. , total solids and dissolved solids) accumulation occurs within 1 meter from the edge of the roadway in snow piles formed by plowing operations and traffic.

Comparative application rates for select snow and ice control strategies. 24 Table 2-20. Reduction in material application loading from changes in strategies. Original Loading 1 Original Strategy 1 Low Pre-wetting Solids Loading 2 High Low Anti-Icing Loading 3 High Low Kg (Lb) Kg (Lb) Kg (Lb) Kg (Lb) Kg (Lb) Kg Dry Abrasives 225 (500) 2700 (6000) 113 5 (250) 1350 5 (3000) 34 4 (75) 405 4 (2100) Dry Solid Chemicals 113 (200) 400 (700) 57 5 (100) 200 (350) 18 1 (65) 110 1 (400) 5 From Tables 2-12 and 2-13.

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