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Transportation Modeling

TTI‘s Transportation Modeling Program uses applied mathematics to solve real-world problems.

The Clean Air Act requires the Environmental Protection Agency (EPA) to set limits on the amount of certain pollutants allowed in the air. Urban areas that exceed EPA standards are said to be in “non-attainment.” The state is required to develop an implementation plan to bring the area back into compliance or its cities face losing vital federal funding. For transportation in Texas, the primary pollutants of concern are oxides of nitrogen (NOx), carbon monoxide (CO) and volatile organic compounds (VOC). In addition, particulate matter, or PM, is a concern for some areas.

We give our sponsors the information they need to achieve compliance with federal clean air standards. Our approach may be abstract, but our products are very real—we help our sponsors maintain their federal funding, improve their environment, and create a healthier community for their citizens.

What's New

Innovative Data Applications Improve Border Planning, Air Quality

Featured image for postUsing GPS Devices to Get Better Emissions Estimates The World Trade Bridge crossing in the Laredo–Nuevo Laredo region is the most used Texas-Mexico port of entry (POE). The crossing’s popularity helps explain the location’s relatively high vehicle emissions, caused by high truck volumes and slow speeds as traffic makes its way across the bridge. A […]

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