CLASSIFICATION OF SNOW AND ICE ON ROADS

SNOW ON ROADS APPEARS IN MANY DIFFERENT TYPES AND CHANGES CEASELESSLY BY THE ACTION OF TRAFFIC, SNOW REMOVAL WORK, AND WEATHER. ATTENTION MUST BE GIVEN TO THESE CHANGES IN THE STUDY OF SNOW REMOVAL AND ICE CONTROL OPERATIONS AND WINTER DRIVING. MEASUREMENTS WERE TAKEN OF DENSITY, HARDNESS TEMPERATURE, AND SOIL CONTENT; AND MICROGRAPHICAL OBSERVATIONS WERE MADE IN THE WINTERS OF 0968-1969 AND 1969-1970 ON THIN SNOW LAYERS COVERING URBAN ARTERIAL ROADS IN HOKKAIDO, JAPAN. BASED ON THESE DATA, THE FOLLOWING CLASSIFICATIONS ARE PROPOSED: NEW SNOW, COMPOSED OF SNOWFLAKES; POWDER SNOW, COMPOSED OF LOOSE GRAINS 0.05 TO 0.3 MM IN DIAMETER AND BLOWN UP BY A PASSING CAR; GRANULAR SNOW, COMPOSED OF LOOSE GRAINS 0.3 MM OR LARGER IN DIAMETER, NEVER BLOWN UP, AND FORMED BY THERMAL METAMORPHOSIS, MECHANICAL MIXING, OR CHEMICAL TREATMENT; PACKED SNOW, COMPOSED OF A NETWORK TEXTURE OF GRAINS OF 0.05 TO 0.3 MM IN DIAMETER; ICE CRUST, FORMED BY FREEZING OF WET PACKED SNOW; ICE FILM, FORMED BY FREEZING OF MELTWATER FILM; AND SLUSH, FORMED BY MELTING OF SNOW AND SPLASHED BY A PASSING CAR. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/sr/sr115/115-002.pdf
• Corporate Authors:

  Highway Research Board (HRB)

  Washington, DC   
• Authors:
  • Kinosita, Seiti
  • Akitaya, Eizi
• Discussers:
  • Volz, M E
  • Poulin, Ambrose
• Conference:
  • Symposium on Snow Removal and Ice Control Research
  • Location: Dartmouth New Hampshire, United States
  • Date: 1970-4-8 to 1970-4-10
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 8-16
• Monograph Title: Snow removal and ice control research
• Serial:
  • Highway Research Board Special Report
  • Issue Number: 115
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Classification; Density; Driving; Hardness; Ice; Icing; Physical properties; Snow; Snow and ice control; Snow removal; Soils; Temperature; Weather
• Old TRIS Terms: Snow & ice properties
• Subject Areas: Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00218679
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Feb 8 1971 12:00AM