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Emissions from Heavy-Duty Trucks at the San Diego-Tijuana Border Crossing

Camilla Kazimi, Felipe Cuamea, Juan Alvarez, Alan Sweedler, Matt Fertig


The volume of heavy-duty trucks crossing the U.S.-Mexican border has increased dramatically as trade restrictions between the two countries have been reduced. As volume and delay at the border increases, so do total emissions. However, very little information is available regarding the level of emissions resulting from trucks crossing the border. In this paper, the results of a survey of trucks crossing the border from Mexico in to the United States at Otay Mesa is described. The fleet of trucks and delay patterns are characterized by day-of-week and time-of-day. This information is then used to calculate total emissions of hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), and particulate matter (PM). The study indicates that while emissions from trucks at the border crossing are negligible compared to total emissions within San Diego County, they are significant within the regions adjacent to the border.

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Print ISSN: 0886-5655
Online ISSN: 2159-1229