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Title:

A FIRST PRINCIPLES PAVEMENT THERMAL MODEL FOR TOPOGRAPHICALLY COMPLEX TERRAIN
Cover of A FIRST PRINCIPLES PAVEMENT THERMAL MODEL FOR TOPOGRAPHICALLY COMPLEX TERRAIN

Accession Number:

00974862

Record Type:

Component

Availability:

N/A
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Order URL: http://worldcat.org/issn/00978515

Abstract:

Pavement temperature in winter has a significant influence on highway maintenance and safety issues concerned with snow and ice management. A forecasting model chain for pavement temperature in topographically varied terrain was developed and was being tested on Interstate 90 in Montana. The chain was initiated with the continental-scale meteorological forecast Eta model calculated on 20-km spacing. This was refined to a 1-km spacing using ARPS, a mesoscale model. Results were then interpolated to essentially provide a 30-m resolution weather forecast. Finally, Radiation Thermal model for Road Temperature (RadTherm/RT) was implemented to calculate terrain or pavement temperature. A RadTherm/RT grid was draped over a digital elevation map to provide a three-dimensional thermal topography, whereby each element or "facet" was given thermal characteristics appropriate to the material type. With the spatially calculated meteorological inputs, the energy balance of the terrain surface was calculated for each facet to forecast the surface temperature. Terrain surfaces took into account the influence of radiation exchange between facets as well as shadowing and sky view factors. Temporally animated surface temperature forecast maps were produced. Spatial variations were in clear evidence in the thermal signature of ridges compared with valleys and material properties. In order to simplify the information for more efficient utility by highway maintenance decision makers, a subset of the full terrain thermal map was provided to display only the highway temperature as a tricolor map. Comparisons of the pavement temperature calculated and measured at a road weather information system station were quite good when the meteorological forecasts were accurate.

Supplemental Notes:

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Report/Paper Numbers:

E-C063,
SNOW04-005
SNOW04-039

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Adams, E E
McKittrick, L R
Gauer, P
Curran, A R

Pagination:

p. 422-432

Publication Date:

2004-6

Serial:

Transportation Research Circular

Issue Number: E-C063
Publisher: Transportation Research Board
ISSN: 0097-8515

Conference:

Sixth International Symposium on Snow Removal and Ice Control Technology

Location: Spokane, Washington
Date: 2004-6-7 to 2004-6-9
Sponsors: Transportation Research Board; Washington State Department of Transportation; American Association of State Highway and Transportation Officials; and Federal Highway Administration.

Features:

Figures (4) ; References (8)

Uncontrolled Terms:

Thermal topography

Subject Areas:

Geotechnology; Highways; Maintenance and Preservation; I62: Winter Maintenance

Files:

TRIS, TRB

Created Date:

Jun 10 2004 12:00AM