Modelling of road surface temperature from a geographical parameter database. Part 2: Numerical

A new ice prediction strategy is presented based on the numerical modelling of surveyed geographical parameters. This approach enables the thermal projection of road surface temperatures across the road network entirely by model predictions and without the need for thermal maps. The influence of eight geographical parameters (latitude, altitude, sky‐view factor, screening, roughness length, road construction, traffic density and topography) is investigated by means of sensitivity analyses. The sky‐view factor is highlighted as the dominant control on road surface temperature, particularly at high levels of atmospheric stability. A numerical road weather model incorporating all eight parameters was run over 20 nights using forecast and retrospective meteorological data. The model has the ability to explain up to 72% of the variation in road surface temperature purely by thermally projecting surface temperature using geographical variables. Retrospective results produce an average r.m.s. error of $1\ ^{\circ}\hbox{C}$ which is comparable to existing UK road weather models. Copyright © 2001 Royal Meteorological Society

[1]  Cloud Types for Observers , 1963 .

[2]  The Development of a Nocturnal Warm Air Layer Within a Shallow Valley , 1968 .

[3]  L. Myrup,et al.  A Numerical Model of the Urban Heat Island. , 1969 .

[4]  Desmond F. Moore,et al.  The Friction of Pneumatic Tyres , 1975 .

[5]  J. Monteith,et al.  Boundary Layer Climates. , 1979 .

[6]  D. Unwin.  THE SYNOPTIC CLIMATOLOGY OF BIRMINGHAM'S URBAN HEAT ISLAND, 1965–74 , 1980 .

[7]  Douw G. Steyn,et al.  The calculation of view factors from fisheye‐lens photographs: Research note , 1980 .

[8]  T. Oke.  Canyon geometry and the nocturnal urban heat island: Comparison of scale model and field observations , 1981 .

[9]  C. Whiteman,et al.  Breakup of Temperature Inversions in Deep Mountain Valleys: Part II. Thermodynamic Model , 1982 .

[10]  John Edward Thornes.  The prediction of ice formation on motorways in Britain , 1984 .

[11]  R H Varey,et al.  Atmospheric Diffusion (3rd edn) , 1984 .

[12]  R. Tabony,et al.  Relations between minimum temperature and topography in great britain , 1985 .

[13]  R. Tabony.  The variation of surface temperature with altitude , 1985 .

[14]  D. B. Johnson.  Urban modification of diurnal temperature cycles in birmingham, U.K. , 1985 .

[15]  J. Mattsson,et al.  Canyon geometry, street temperatures and urban heat island in malmö, sweden , 1985 .

[16]  J. Thornes.  THE USE OF A COMPUTER MODEL TO PREDICT THE FORMATION OF ICE ON ROAD SURFACES , 1986 .

[17]  B. W. Thompson.  SMALL‐SCALE KATABATICS AND COLD HOLLOWS , 1986 .

[18]  J. E. Hay,et al.  The Determination of Sky View-Factors in Urban Environments Using Video Imagery , 1986 .

[19]  P. Rayer,et al.  The Meteorological Office forecast road surface temperature model , 1987 .

[20]  Barry.  ATMOSPHERE WEATHER & CLIMATE , 1988 .

[21]  Torbjörn Gustavsson,et al.  MODELLING OF LOCAL CLIMATE FOR PREDICTION OF ROAD SLIPPERINESS , 1989 .

[22]  J. Thornes,et al.  A preliminary performance and benefit analysis of the UK national road ice prediction system , 1989 .

[23]  J. Bogren,et al.  Road slipperiness during warm-air advections , 1990 .

[24]  Variation in road surface temperature due to topography and wind , 1990 .

[25]  J. Shao,et al.  Spectral analysis and sensitivity tests for a numerical road surface temperature prediction model , 1991 .

[26]  John E. Thornes,et al.  Thermal mapping and road-weather information systems for highway engineers , 1991 .

[27]  J. Bogren.  Screening effects on road surface temperature and road slipperiness , 1991 .

[28]  John E. Thornes,et al.  A comparison of UK road ice prediction models , 1991 .

[29]  I. D. Watson,et al.  Simulation of surface urban heat islands under ‘ideal’ conditions at night part 2: Diagnosis of causation , 1991 .

[30]  Torbjörn Gustavsson,et al.  A description of a local climatological model used to predict temperature variations along stretches of road , 1992 .

[31]  P. H. Gudiksen,et al.  Measurements and Modeling of the Effects of Ambient Meteorology on Nocturnal Drainage Flows , 1992 .

[32]  Erich J. Plate,et al.  Model study of the development of boundary layers above urban areas , 1992 .

[33]  E. Linacre,et al.  Climate data and resources , 1992 .

[34]  B. Sass,et al.  A numerical model for prediction of road temperature and ice , 1992 .

[35]  OBJECTIVE METHOD FOR IMPROVING THE OPERATIONAL PERFORMANCE OF A ROAD ICE PREDICTION MODEL USING INTERPOLATED MEOSCALE OUTPUT AND A TEMPLET FOR CORRECTING SYSTEMATIC ERROR , 1992 .

[36]  Local Climatological Modelling for Road Stretches and Urban Areas , 1992 .

[37]  J. Bogren,et al.  Evaluation of a local climatological model - test carried out in the county of Halland, Sweden , 1993 .

[38]  J. Thornes,et al.  ROAD WEATHER INFORMATION SYSTEMS VOLUME 1: RESEARCH REPORT , 1993 .

[39]  Jon Wiernga.  Representative roughness parameters for homogeneous terrain , 1993 .

[40]  P W Frohling.  A NEURAL NETWORK FOR SHORT TERM TEMPERATURE FORECAST ON ROADS , 1994 .

[41]  K. Blennow.  Sky View Factors from High-Resolution Scanned Fish-eye Lens Photographic Negatives , 1995 .

[42]  T. Gustavsson.  A study of air and road‐surface temperature variations during clear windy nights , 1995 .

[43]  Ingegärd Eliasson,et al.  Urban nocturnal temperatures, street geometry and land use , 1996 .

[44]  J Shao,et al.  An Automated Nowcasting Model of Road Surface Temperature and State for Winter Road Maintenance , 1996 .

[45]  J. Thornes,et al.  A COMPARISON BETWEEN SPATIAL WINTER INDICES AND EXPENDITURE ON WINTER ROAD MAINTENANCE , 1996 .

[46]  The structure of katabatic flows down a simple slope , 1997 .

[47]  V K Dravitzki,et al.  ROAD WEATHER INFORMATION SYSTEMS , 1997 .

[49]  J. Shao,et al.  Improving Nowcasts of Road Surface Temperature by a Backpropagation Neural Network , 1998 .

[50]  Torbjörn Gustavsson,et al.  Development of Temperature Patterns during Clear Nights , 1998 .

[51]  Göran Blomqvist,et al.  IMPACT OF DE-ICING SALT ON ROADSIDE VEGETATION. , 1998 .

[52]  M. Best,et al.  A Model to Predict Surface Temperatures , 1998 .

[53]  The variation of road‐surface temperatures in Devon, UK during cold and occluded front passage , 1999 .

[54]  Torbjörn Gustavsson,et al.  Thermal mapping – a technique for road climatological studies , 1999 .

[55]  T. Gustavsson,et al.  Local temperature differences in relation to weather parameters , 2000 .

[56]  T. Gustavsson,et al.  The impact of screening on road surface temperature , 2000 .

[57]  I. Karlsson.  Nocturnal Air Temperature Variations between Forest and Open Areas. , 2000 .

[58]  J. Shao,et al.  Fuzzy Categorization of Weather Conditions for Thermal Mapping , 2000 .

[59]  L. Chapman.  Assessing topographic exposure , 2000 .

[60]  U. Postgård,et al.  Air and road surface temperature variations during weather change , 2001 .

[61]  Lee Chapman,et al.  Rapid determination of canyon geometry parameters for use in surface radiation budgets , 2001 .

[62]  David B. Stephenson,et al.  How to judge the quality and value of weather forecast products , 2001 .

[63]  Lee Chapman,et al.  Modelling Spatial and Temporal Road Thermal Climatology in Rural and Urban Areas Using a GIS , 2002 .