<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>Alaska Department of Transportation &amp; Public Facilities Intelligent
Specialty Vehicle System Pilot Program Report</title>
      <link>https://trid.trb.org/View/814910</link>
      <description><![CDATA[The Intelligent Specialty Vehicle System (ISVS) is equipped with Precision Global Positioning System (PGPS) technology which is delivered in the form of Real Time Kinematics (RTK) to the vehicle from a single dedicated GPS base station. The vehicle mounted system has integrated collision avoidance radar technology designed to provide the driver a means to maintain desired lane position and avoid collisions with obstacles during periods of low visibility. The PGPS provides position information to the vehicle which can be as accurate as 3 cm. Distance from the PGPS determines the final accuracy, the further the ISVS is from the PGPS, the lower the accuracy. This project is motivated by the fact that specialty vehicles often must operate under inclement weather conditions. The driver assistive system improves safety for the specialty vehicle operator by providing the necessary cues for lane keeping and collision avoidance normally unavailable during poor visibility conditions. The driver assistive system, when placed in snow and ice  control vehicles, improves safety by facilitating all-weather road services which keep roads open and passable for other emergency vehicles and the general motoring public. A snow blower and snowplow are the primary vehicles of the ISVS project for the Alaska Department of Transportation and Public Facilities (ADOT&PF). The project implemented, operated and evaluated all necessary infrastructure components, in-vehicle sensing technology, in-vehicle processing including algorithms, and driver-vehicle interfaces. Testing of these systems took place on state highways using state vehicles under all conditions including low-visibility conditions such as snow, blowing snow, ice fog, and night.]]></description>
      <pubDate>Tue, 28 Aug 2007 10:56:39 GMT</pubDate>
      <guid>https://trid.trb.org/View/814910</guid>
    </item>
    <item>
      <title>ICE AND FOG: DETECTION AND WARNING SYSTEMS. DECEMBER 1985 - MAY 1990 (A BIBLIOGRAPHY FROM THE NTIS DATABASE)</title>
      <link>https://trid.trb.org/View/344655</link>
      <description><![CDATA[This bibliography contains citations concerning the detection methods and warning systems for sea ice, aircraft ice, bridge ice and fog formation.  Remote aerial sensing and ground based detection systems are among the methods discussed.  (This updated bibliography contains 150 citations, 75 of which are new entries to the previous edition.)]]></description>
      <pubDate>Fri, 30 Nov 1990 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/344655</guid>
    </item>
    <item>
      <title>ICE AND FOG: DETECTION AND WARNING SYSTEMS. DECEMBER 1985-NOVEMBER 1986</title>
      <link>https://trid.trb.org/View/274857</link>
      <description><![CDATA[This bibliography contains citations concerning the detection methods and warning systems for sea ice, aircraft ice, bridge ice, and fog formation.  Remote aerial sensing and ground based detection systems are among the methods discussed.  (This updated bibliography contains 54 citations, all of which are new entries to the previous edition.)]]></description>
      <pubDate>Thu, 30 Apr 1987 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/274857</guid>
    </item>
    <item>
      <title>FOG DISPERSAL (A BIBLIOGRAPHY WITH ABSTRACTS)</title>
      <link>https://trid.trb.org/View/144072</link>
      <description><![CDATA[Studies concerned with fog dispersal techniques are cited, primarily concentrating on dispersal at airports. The physics and chemistry of fog dispersal, dispersing chemicals, the use of helicopter downwash to remove fog, and electrical dispersing methods are included. (This updated bibliography contains 230 abstracts, 8 of which are new entries to the previous edition.)]]></description>
      <pubDate>Wed, 27 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144072</guid>
    </item>
    <item>
      <title>ICING UPDATE</title>
      <link>https://trid.trb.org/View/85166</link>
      <description><![CDATA[No Abstract.]]></description>
      <pubDate>Wed, 25 Apr 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/85166</guid>
    </item>
    <item>
      <title>ICE FOG (A BIBLIOGRAPHY WITH ABSTRACTS)</title>
      <link>https://trid.trb.org/View/77959</link>
      <description><![CDATA[The bibliography includes citations relating to ice formation, modification, dispersal and forecasting. Problems of white outs and thermal pollution effects in arctic regions are discussed. (This updated bibliography contains 58 abstracts, 2 of which are new entries to the previous edition.)]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/77959</guid>
    </item>
    <item>
      <title>RESEARCH ON CONTROL TECHNOLOGY FOR ICE FOG FROM MOBILE SOURCES</title>
      <link>https://trid.trb.org/View/78024</link>
      <description><![CDATA[Automotive generated ice fog is a form of air pollution that results when exhaust water vapor freezes into minute particles which form a dense fog. The major control technique evaluated was cooling the exhaust gases to well below the dew point, thus condensing water vapor into a liquid stream before final discharge. During the winters of 1974-75 and 1975-76 the Arctic Environmental Research Station evaluated 12 cooler-condensers on nine inservice vehicles. It was found that ice film formation decreased heat transfer efficiency. An ice fog mass emission reduction up to 80 percent was attained with cooler-condensers on motor vehicles. However, the increase in visibility over roads was not proportional because of the many other ice fog sources. The overall impact of automotive ice fog control would be a visibility increase of at least 70 percent in areas where motor vehicles create 50 percent or more of the ice fog. Control of automobile-generated ice fog would also mean cleaner air, but perhaps more ice on the road. Cleaner air would result because sulfur oxides and lead compounds would be absorbed in the condensate. This condensate, if allowed to drip from the cooler-condensers, would freeze onto the road and require a more intense snow removal effort.]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/78024</guid>
    </item>
    <item>
      <title>A SURVEY OF ICING CONDITIONS FOR MARINE GAS TURBINES</title>
      <link>https://trid.trb.org/View/57838</link>
      <description><![CDATA[A literature survey was conducted to define the possible hydrometeorological conditions during which icing of the gas turbine inlets of a ship could occur. Also included is a list of all sources of information used during the survey. A frequency-of-occurrence study of the icing conditions found during the literature survey was also done and the results included as maps of the North Atlantic. The North Atlantic was chosen as it gave the most complete data base available at the time.]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57838</guid>
    </item>
    <item>
      <title>ICE FOG (A BIBLIOGRAPHY WITH ABSTRACTS)</title>
      <link>https://trid.trb.org/View/57896</link>
      <description><![CDATA[The bibliography includes citations relating to ice formation, modification, dispersal and forecasting. Problems of white outs and thermal pollution effects in arctic regions are discussed. (This updated bibliography contains 57 abstracts, 8 of which are new entries to the previous edition.)]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57896</guid>
    </item>
    <item>
      <title>FOG DISPERSAL: A TECHNOLOGY ASSESSMENT</title>
      <link>https://trid.trb.org/View/59839</link>
      <description><![CDATA[The dispersal of supercooled fog and stratus (i.e., liquid water clouds at temperatures below 0 degree C) was the objective of the most publicized early weather modification experiments and is presently the only truly operational modification technology.  Recent developments in the dispersal of warm fog (i.e., clouds of droiplets at temperatures above 0 degree C) have brought that undertaking to the brink of widespread operational implementation.  The paper describes the concepts and recent developments in warm and supercooled fog dispersal and presents the evidence for recent optimism in the operational implementation of these concepts.  Ice fog (i.e., clouds of ice particles) remains a rare but stubborn phenomenon whose dispersal is presently only in the conceptual stage of development.]]></description>
      <pubDate>Tue, 27 Dec 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/59839</guid>
    </item>
    <item>
      <title>FOG DISPERSAL (A BIBLIOGRAPHY WITH ABSTRACTS)</title>
      <link>https://trid.trb.org/View/24027</link>
      <description><![CDATA[Studies concerned with fog dispersal techniques and physics are presented. Most of the reports cover dispersal at airports; however, the 167 abstracts also include research on the physics and chemistry of fog dispersal, fog dispersing chemicals, the use of helicopter downwash to remove fog, electrical dispersing methods, plus other dispersal techniques. Both warm fog and ice fog are covered.]]></description>
      <pubDate>Thu, 26 Jun 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/24027</guid>
    </item>
    <item>
      <title>STUDIES ON ICE FOG</title>
      <link>https://trid.trb.org/View/106213</link>
      <description><![CDATA[VARIOUS ATMOSPHERIC FACTORS IN ICE FOGS, SUCH AS SIZE AND CONCENTRATION OF ICE-FOG CRYSTALS, CONDENSATION NUCLEI AND ICE NUCLEI, AMOUNT OF WATER VAPOR, TEMPERATURE PROFILE NEAR THE SOURCES OF ICE FOG, WERE MEASURED. A PHYSICAL MECHANISM OF ICE FOG FORMATION IS PROPOSED. /AUTHOR/]]></description>
      <pubDate>Fri, 02 Jul 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106213</guid>
    </item>
    <item>
      <title>ICE FOG - LOW TEMPERATURE AIR POLLUTION</title>
      <link>https://trid.trb.org/View/107339</link>
      <description><![CDATA[STABLE PRESSURE SYSTEMS OVER INTERIOR ALASKA SOMETIMES PRODUCE PROLONGED, EXTREME (BELOW -40 C) COLD SPELLS AT THE SURFACE. THE RATE OF RADIATIVE COOLING OF THE AIR IS ENHANCED BY SUSPENDED ICE CRYSTALS WHICH ARE THEMSELVES A RESULT OF THE INITIAL COOLING. RADIATION FOGS FORMED DURING THE ONSET OF COLD SPELLS ARE GENERALLY OF SHORT DURATION BECAUSE THE AIR SOON BECOMES DESICCATED. THESE FOGS CONSIST OF SUPERCOOLED WATER DROPLETS UNTIL THE AIR TEMPERATURE GOES BELOW THE "SPONTANEOUS FREEZING POINT" FOR WATER DROPLETS (ABOUT -40 C); THE FOG THEN BECOMES AN ICE CRYSTAL FOG, OR SIMPLY "ICE FOG." DURING THE COOLING CYCLE WATER IS GRADUALLY CONDENSED OUT OF THE AIR UNTIL THE DROPLETS FREEZE. THE PERSISTENCE OF FAIRBANKS ICE FOG DEPENDS ON A CONTINUAL SOURCE OF MOISTURE FROM HUMAN ACTIVITIES WITHIN THE FOG. MOST OF THE ICE FOG CRYSTALS HAVE SETTLING RATES WHICH ARE SLOWER THAN THE UPWARD VELOCITY OF AIR OVER THE CITY CENTER. THE UPWARD AIR MOVEMENT IS CAUSED BY CONVECTION CELLS DRIVEN BY THE 60 C "HEAT ISLAND" OVER FAIRBANKS. THIS CAUSES A REDUCED PRECIPITATION RATE WHICH PERMITS THE DENSITY OF ICE FOG IN THE CITY CENTER TO BE THREE TIMES GREATER THAN THAT IN THE OUTLYING AREAS. THE INVERSIONS WHICH OCCUR DURING COLD SPELLS OVER FAIRBANKS BEGIN AT GROUND LEVEL AND ARE AMONG THE STRONGEST AND MOST PERSISTENT IN THE WORLD. THEY ARE THREE TIMES STRONGER THAN THOSE IN THE INVERSION LAYER OVER LOS ANGELES. THUS, THE LOW-LYING AIR OVER FAIRBANKS STAGNATES AND BECOMES EFFECTIVELY DECOUPLED FROM THE ATMOSPHERE ABOVE, PERMITTING HIGH CONCENTRATIONS OF ALL POLLUTANTS. /AUTHOR/]]></description>
      <pubDate>Mon, 18 Jan 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107339</guid>
    </item>
  </channel>
</rss>