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I-35W AND MISSISSIPPI RIVER BRIDGE ANTI-ICING PROJECT OPERATIONAL EVALUATION REPORT.
| 题名： | I-35W AND MISSISSIPPI RIVER BRIDGE ANTI-ICING PROJECT OPERATIONAL EVALUATION REPORT. |
| 作者： | Johnson-C |
| 关键词： | Acetates-; Anti-icing; Average-daily-traffic; Black-ice; Bridges-; Cold-weather; Deicing-chemicals; Environmental-protection; Exhaust-gases; Hazards-; Heavy-duty-vehicles; Interstate-highways; Minneapolis-Minnesota; Operations-; Potassium-; Road-weather-information-systems; Testing-; Traffic-accidents; Traffic-congestion; Traffic-safety; Winter-; Winter-maintenance |
| 摘要： | A bridge that spans the Mississippi River on U.S. Interstate 35W in Minneapolis, Minnesota has been fitted with a computerized system that sprays potassium acetate, the anti-icing chemical selected, on the bridge deck when data from sensors and a Road Weather Information System determine that hazardous winter driving conditions are imminent. The I-35W bridge was a candidate for this high-tech treatment due to the high incidence of winter traffic crashes on the bridge. The bridge is more susceptible to "black ice" and slippery conditions because of moisture from the Mississippi River's St. Anthony Falls, nearby power plants and industrial facilities, and of the high volume of traffic on the bridge. (Year 2000 average daily traffic is approximately 139,000 vehicles.) The formation of "black ice" is due to the combination of extreme cold and heavy vehicle exhaust from congestion on the bridge. In addition to traffic safety, the anti-icing system also contributes to sustainability, because the chemical used is environmentally less toxic and corrosive than sodium chloride, which traditionally has been used. This paper describes the anti-icing system and its operational test results. |
| 总页数： | 2001/07. pp34 (5 Fig., 11 Tab.) |
| 报告类型： | 科技报告 |
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