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    <title>Transport Research International Documentation (TRID)</title>
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    <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>
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      <title>Transport Research International Documentation (TRID)</title>
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      <link>https://trid.trb.org/</link>
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    <item>
      <title>PITTSBURGH METROPOLITAN AREA AIR POLLUTION EMISSION INVENTORY</title>
      <link>https://trid.trb.org/View/8240</link>
      <description><![CDATA[An emmission inventory for the Pittsburgh Metropolitan area is presented.  Total emissions of sulfur oxides, particulates, carbon monoxide, nitrogen oxides, and hydrocarbons were estimated as a function of source type, season, and geographical distribution.  The major sources included motor vehicles, industrial processes, steam-electric power plants, domestic heating, commercial and institutional fuel combustion, refuse disposal, incineration, open burning, aircraft, railroads, and vessels.  Data on combustion of coal, residual and distillate fuel oils, and natural gas are tabulated.]]></description>
      <pubDate>Fri, 23 May 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/8240</guid>
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      <title>VARIOUS METHODS OF EMISSION ESTIMATION OF VEHICULAR TRAFFIC IN DELHI</title>
      <link>https://trid.trb.org/View/542825</link>
      <description><![CDATA[Traffic is the predominant source of pollution in urban cities like Delhi. Continuous monitoring of the air quality in roads will be very costly and impracticable. To carry out model calculations is a useful alternative to measuring. The most crucial parameter of models is the source strength, which can be estimated in many ways. In the present study, four different methods of source estimation of vehicular traffic, have been proposed. These methods have been evaluated by means of an air quality model, i.e. IIT Line Source (IITLS) model.]]></description>
      <pubDate>Tue, 12 Jan 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/542825</guid>
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    <item>
      <title>EVALUATION OF AMBIENT AIR QUALITY MONITORING PROCEDURES OUTSIDE OF CONTAINMENT</title>
      <link>https://trid.trb.org/View/542552</link>
      <description><![CDATA[To assess the New York State Department of Transportation's Class A Containment Specifications for the abrasive blasting of painted steel structures, the Environmental Analysis Bureau monitored the air quality at 17 containment sites on 15 bridges across the state in 1993 and 1994.  Researchers examined efforts to prevent exceedances of ambient air quality criteria for lead dust and other particulates.  They considered variables such as the duration of blasting and the percent of lead in the paint.  Total suspended particulates (TSP), TSP-lead, particulate matter of 10 micrometers or smaller (PM10), and PM10-lead were measured.  U.S. Environmental Protection Agency reference methods were used. Analyses of the criteria exceedance data and the relationships exhibited between 24-hour average concentrations of both particulate analytes and between both lead analytes indicate that TSP and TSP-lead result in a very high rate of capture for all four analyte criteria exceedances.  The air quality monitoring was productive in determining the effectiveness of the Class A Specification.  It is concluded that monitoring for TSP and TSP-lead is sufficient to measure the atmospheric loading of dust and lead particles for this type of work.]]></description>
      <pubDate>Wed, 06 Jan 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/542552</guid>
    </item>
    <item>
      <title>AIR MONITORING OF LIQUID ASPHALT ADDITIVES (WITH DISCUSSION)</title>
      <link>https://trid.trb.org/View/487672</link>
      <description><![CDATA[Morton International decided there was a need to determine what types and amount of the chemical components were present in the air when using PAVE BOND (R) antistripping agent. A two-phase research project was begun in 1989. Phase 1 was the design of experiments for the collection and identification of the volatiles under controlled laboratory conditions. Phase 2 of the project applied the methods and procedures of sampling developed in Phase 1 to field conditions. The goals of the field monitoring were: (1) to verify if the sampling techniques could collect materials as expected; (2) to evaluate the laboratory capabilities of identifying collected materials; (3) to determine if measurable amounts of amines were present; (4) to identify the volatile components from the antistripping additive at the field site.]]></description>
      <pubDate>Thu, 02 Jul 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/487672</guid>
    </item>
    <item>
      <title>TRANSPORTATION CONTROL MEASURE ANALYSIS PROCEDURES</title>
      <link>https://trid.trb.org/View/572251</link>
      <description><![CDATA[This study developed methodologies for analyzing travel and emission charges resulting from individual transportation control measures (TCMs) and TCM packages.  The work establishes new conceptual and analytical methodologies useful for transportation and air quality planners who must evaluate TCMs as part of air quality attainment plans.  Four major steps were conducted as part of this project: 1) a brief literature review and conceptual discussion linking specific TCMs to travel and emission changes; 2) development of a conceptual framework for analyzing TCMs; 3) creation of quantitative methodologies to evaluate specific measures and measure packages; and 4) application of the methodologies to a sample area to demonstrate their use.]]></description>
      <pubDate>Tue, 24 Jun 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/572251</guid>
    </item>
    <item>
      <title>DRY DEPOSITION OF POLYCYCLIC AROMATIC HYDROCARBONS IN AMBIENT AIR</title>
      <link>https://trid.trb.org/View/481798</link>
      <description><![CDATA[Polycyclic aromatic hydrocarbons (PAHs) and their derivatives are widespread harmful compounds generated by incomplete combustion of organic material, resulting primarily from urban traffic emissions.  The petrochemical industry (PCI) is an important industry in Taiwan and one that is responsible for generating a large amount of PAHs as well.  Consequently, urban areas with PCI plants pose a health problem.  PAH measurement via air-toxics monitoring programs are extremely important in the vicinity of large PCI plants.  The authors conducted dry deposition and air sampling simultaneously in the ambient air of an urban site and a PCI plant by using several dry deposition plates and PS-1 samplers from January to May 1994 in southern Taiwan.  The objective of the study was to characterize the PAH dry deposition in these two areas.  The dry deposition flux and ambient air concentration of both PAHs and total-particle mass were measured. Then, the dry deposition velocity and dry deposition flux of PAHs contributed by the particle phase and gas phase, respectively, were computed and discussed.]]></description>
      <pubDate>Thu, 20 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/481798</guid>
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    <item>
      <title>AIR QUALITY IN THE STREETS OF DENMARK. CALCULATIONS RELATED TO 34 STREETS</title>
      <link>https://trid.trb.org/View/453849</link>
      <description><![CDATA[A system is proposed for monitoring the air quality on the streets of Danish towns.  The monitoring system is tested on traffic data from the period 1985-1992.  Calculations show a drop in levels of CO on all streets and a smaller drop in the occurrence of NO(sub2).  One reason for this reduction is reckoned to be an improved engine technology and the introduction of catalytic converters on the new cars at the end of the period. On approach roads and thoroughfares traffic has increased, on main streets and urban areas it has remained the same and it is reduced on main streets in central areas.  It is recommended that a selected count should be carried out annually, the proportion of heavy traffic and speed measurements should be registered, a continuous evaluation should be made as to whether patterns of traffic growth on these streets are typical of Danish urban areas and the calculation model should be regularly updated.]]></description>
      <pubDate>Wed, 06 Mar 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/453849</guid>
    </item>
    <item>
      <title>CONCURRENT AIR QUALITY ANALYSIS UNDER THE NATIONAL ENVIRONMENTAL POLICY ACT AND TRANSPORTATION/AIR QUALITY CONFORMITY</title>
      <link>https://trid.trb.org/View/457699</link>
      <description><![CDATA[This paper addresses the direct and indirect relationships between the National Environmental Policy Act (NEPA) and the new conformity requirements. This paper concludes that NEPA and transportation/air quality conformity processes should be concurrent. The need for concurrent determinations is supported by five arguments: (1) the legislative history of conformity indicates that project conformity determinations be made during the NEPA process; (2) general NEPA requirements specify coordination between environmental processes; (3) the level of technical detail required for conformity analyses meets or exceeds the level already required for NEPA; (4) unless conformity is taken into account, alternatives and mitigation measures generated during the NEPA analytical process may later result in a negative conformity determination; and (5) public comment periods, unless coordinated, would run consecutively rather than concurrently, potentially delaying project implementation.]]></description>
      <pubDate>Tue, 13 Feb 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/457699</guid>
    </item>
    <item>
      <title>AIR QUALITY IMPACTS OF ELECTRIC VEHICLES</title>
      <link>https://trid.trb.org/View/447599</link>
      <description><![CDATA[The potential air quality impacts of electric vehicles in North Carolina are evaluated considering both air pollution reductions from less use of internal combustion engine vehicles and also additional air pollution at electric power plants.  Using a consumer survey of 260 households, estimates of EV sales at $20,000 per vehicle, $15,000 and $10,000 are first made.  EV purchases are classified as to whether they would be additional (new to family) or replacements of conventional cars.  For additional vehicles, the extra pollution is computed as mileage driven, times KWH/mile, times power plant pollution rates.  This pollution is then attributed directly to power plants, using NC pollution rates and the NC fuel mix.  For replacement vehicles, EV pollution added to power plants is offset by direct pollution savings from ICE vahicles.  Pollution effects are computed for each observation and displayed on a GIS of the state.  Results show that EV air pollution effects are highly dependent on the assumptions made about the fraction of additional vs. replacement vehicles, and future power plant emission rates. The study concludes that EV effects on air pollution are highly uncertain.]]></description>
      <pubDate>Tue, 26 Sep 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/447599</guid>
    </item>
    <item>
      <title>NEW AIR QUALITY MONITORS SHOW SURPRISING RESULTS</title>
      <link>https://trid.trb.org/View/450725</link>
      <description><![CDATA[Article discussing how a new system of monitoring pollution at airports over a wide area has resulted in a few surprises -- most notably, that larger aircraft are not necessarily the major polluters.]]></description>
      <pubDate>Thu, 14 Sep 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/450725</guid>
    </item>
    <item>
      <title>WIDE-AREA REMOTE SENSING OF AIR QUALITY IMPACTS OF ITS</title>
      <link>https://trid.trb.org/View/450694</link>
      <description><![CDATA[An operational test of a wide-area remote sensing system was conducted to evaluate its ability to monitor air quality impacts of traffic events. A light detection and ranging (LIDAR or lidar) system was used to obtain spatially and temporally resolved images of particulate plumes. Lidar operates on the same principle as does radar, only with a laser beam swept through the atmosphere rather than a radio wave. In this test, the lidar was operated in an urban area and the sweep was confined to distances fairly close to ground level to monitor vehicle-related plumes. The range was about 10 km. Point-sampled measurements of particulate matter and CO concentrations were also made such that comparisons between lidar data and local pollutant concentrations could be made. The objective was to demonstrate the capabilities and limitations of lidar technology for use as an air quality monitoring tool.]]></description>
      <pubDate>Thu, 07 Sep 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/450694</guid>
    </item>
    <item>
      <title>A MICROSCALE DISPERSION MODEL FOR CARBON MONOXIDE EMITTED FROM MOTOR VEHICLES</title>
      <link>https://trid.trb.org/View/427142</link>
      <description><![CDATA[The purpose of this study is to analyse the diurnal variability of CO concentration observations using different fitted statistical distributions. A simple microscale dispersion model was also used to predict the local effect of heavily-travelled roads on carbon monoxide concentrations measured at certain monitoring stations in the Thessaloniki basin. The model results were validated and compared with actual measurements. Comparisons are also presented among CO vertical concentration profiles observed in urban street canyons of Athens and estimates from semi-empirical models.]]></description>
      <pubDate>Thu, 31 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/427142</guid>
    </item>
    <item>
      <title>METHODOLOGY FOR EVALUATING ATIS IMPACTS ON AIR QUALITY</title>
      <link>https://trid.trb.org/View/425951</link>
      <description><![CDATA[An analytical method for evaluating the impact on air quality of rerouting traffic guided by Advanced Traveler Information Systems (ATIS) is presented.  The method is applied to a simple road network composed of two routes, one of which is experiencing incident congestion.  Total emissions of carbon monoxide (CO), volatile organic compounds (VOC), and oxides of nitrogen (NO) on the two routes are assessed with and without ATIS.  Emissions are evaluated for three time intervals:  1993-98, 1998-2003, and 2003 and beyond.  Findings indicate that CO and VOC can be reduced systemwide by implementing ATIS.  In addition, greater CO and VOC emissions reduction can be realized with higher ATIS market-penetration levels.  With the exception of small market-penetration levels, though, ATIS may have a negative impact on NO emissions.  While ATIS alone cannot surpass improved emission controls in reducing emissions, a greater reduction of emissions can be achieved if the strategies are coupled, as opposed to any one strategy.  A coupling would most likely eliminate the negative impact of ATIS on NO emissions as well.]]></description>
      <pubDate>Thu, 22 Jun 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/425951</guid>
    </item>
    <item>
      <title>SOURCE APPORTIONMENT OF WINTERTIME PM-10 AT SAN JOSE, CALIFORNIA</title>
      <link>https://trid.trb.org/View/425534</link>
      <description><![CDATA[San Jose, California, was the site of a pilot air quality monitoring study conducted from December 16, 1991, to February 24, 1992.  The authors took daytime and nighttime samples of wintertime particulate matter (PM-10).  Source profiles from local paved road dust were combined with source profiles from other studies for input to the Chemical Mass Balance receptor model to apportion the measured PM-10 to sources and to determine the additional information needed to develop emission-reduction strategies.  During the study period and especially in nighttime samples, residential wood combustion was the largest contributor, averaging nearly 45 percent of the PM-10 mass.  Primary motor vehicle exhaust, resuspended road dust, and secondary ammonium nitrate were other significant sources, each contributing between 15 and 20 percent of the average wintertime PM-10.  Less than 5 percent of the average PM-10 was attributed to secondary ammonium sulfate and primary marine aerosol contributions.]]></description>
      <pubDate>Mon, 08 May 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/425534</guid>
    </item>
    <item>
      <title>BARCELONA AIR QUALITY INITIATIVE: A RESEARCH REPORT ON LIDAR APPLICATIONS TO STUDY URBAN ENVIRONMENTAL CONDITIONS. FINAL REPORT</title>
      <link>https://trid.trb.org/View/411554</link>
      <description><![CDATA[In June 1992, the Los Alamos lidar (a type of laser radar) team was asked to participate in a study of the urban air pollution in and around Barcelona, Spain.  This study was to take place before and during the Summer Olympic Games (July-August 1992). Because the city closed areas of Barcelona to traffic and limited access to other areas, we had the opportunity to study the spatial and temporal contribution of vehicles to the overall pollution problem.  The effectiveness of remediation efforts in other cities could be gauged by the results in Barcelona.  This multinational study included members from the Federal Republic of Germany and Spain, as well as the Los Alamos lidar team from the United States.  The study was originally intended to include a campaign of traffic monitoring and meteorological measurements in addition to computer modelling.  This report describes the equipment fielded by the Los Alamos team and the methodologies used to gather the data.  The lidar data yielded information about atmospheric phenomena, aerosol sources, and traffic correlations.  Averaged results show correlations with observed traffic patterns, but these can be compromised by the effects of inversions and wind flow; aerosol sources were determined by correlating strong backscatter returns with locations on the map such as intersections, metrostations, and the stadiums; atmospheric phenomena were observed with the vertical scans, which showed layering of the atmosphere, lack of coupling of the convective mix layer with upper layers, and in-and-out flow of aerosols in the upper-planetary boundary layers.  This project was the first large-scale traffic study ever attempted using the lidar; as such, a great number of lessons were learned.]]></description>
      <pubDate>Tue, 03 Jan 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/411554</guid>
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