STUDY OF FROST AND ICE PREDICTION SYSTEM ON THE ROUGH RIVER BRIDGE - FINAL REPORT
The objective of this study was to predict the formation of frost and ice on bridge decks using trends in the local meteorological conditions in time to apply countermeasures. The prediction theory was based on the fact that frost forms on an object which is below both the freezing temperature and the dewpoint temperature. In order to predict this condition meteorological equipment was installed to measure air temperature, humidity, and deck temperature on the study bridge. In addition measures of barometric pressure, wind speed and direction were included as indicators of possible major changes in the weather. Based on the results of this study, the roadway temperature is not normally more than 5 degrees below the air temperature indicating any prediction of frost would require at least 80% relative humidity. Also, because of the heating effects of the sun, any prediction must fall in the nondaylight hours. Two major detrimental effects precluded this method as a viable solution to this problem. One was that the necessity of a sufficient amount of humidity in the air is the prime contributor to a frost condition, and this variable was the least predictable. The second was that salt used for removing snow and ice from the bridge deck remained on the roadway for approximately a week after application depressing the freezing point on the road surface by varying and unpredictable amounts and precluding any frost formation during the study period. /FHWA/
- Sponsored by FHWA.
Michigan Department of State Highways & TransportState Highways Building, P.O. Drawer K
Lansing, MI United States 48904
- Crane, H L
- Paesani, G F
- Blikken, W A
- Publication Date: 1974-10
- Pagination: 42 p.
- TRT Terms: Atmospheric pressure; Bridge decks; Forecasting; Frost; Humidity; Ice; Measuring instruments; Meteorological phenomena; Temperature; Wind
- Old TRIS Terms: Barometric pressure; Meteorological data
- Subject Areas: Bridges and other structures; Highways; Pavements;
- Accession Number: 00130591
- Record Type: Publication
- Source Agency: Federal Highway Administration
- Report/Paper Numbers: Final Rpt.
- Files: TRIS, USDOT, STATEDOT
- Created Date: Mar 29 1976 12:00AM