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 exceedEPA 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, orPM, 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
TTI MOVES Emissions Estimates Forward

Change can be difficult…but it doesn’t have to be. Given that we live in the Information Age, change involving software can be the most painful of all — just ask Microsoft.

The Environmental Protection Agency (EPA) uses software to enforce the Clean Air Act, which restricts certain pollutants found in urban areas with heavy traffic. Cities that exceed these standards are said to be in “nonattainment.” Using software called MOBILE6, agencies can estimate future vehicle emissions, and individual states can use data to create these implementation plans to bring their nonattainment areas into compliance.

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