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Transportation's Role in Reducing U.S. Greenhouse Gas Emissions ...

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Transportation’s <strong>Role</strong> <strong>in</strong> Reduc<strong>in</strong>g U.S. <strong>Greenhouse</strong> <strong>Gas</strong> <strong>Emissions</strong>: Volume 2<br />

tak<strong>in</strong>gs, or other community and environmental impacts. Clos<strong>in</strong>g at-grade cross<strong>in</strong>gs may<br />

hurt local mobility (unless overpasses are provided) but will improve safety by reduc<strong>in</strong>g<br />

exposure at tra<strong>in</strong> cross<strong>in</strong>gs.<br />

Table 4.4<br />

Emission Factors (grams per TEU-mile), Modeled East Coast<br />

Shipp<strong>in</strong>g Alternatives<br />

Mode VOC CO NO x PM 10 SO x<br />

Truck 0.34 1.64 6.86 0.12 0.22<br />

Rail 0.14 0.39 2.81 0.07 0.03<br />

Ship 0.30 1.37 7.93 0.23 3.91<br />

Source: Corbett et al. 2007.<br />

Feasibility<br />

To date most of the easier rail capacity improvement projects have been built, leav<strong>in</strong>g<br />

primarily the more difficult and expensive projects. In addition to be<strong>in</strong>g expensive, many<br />

of the rema<strong>in</strong><strong>in</strong>g critical needs are set <strong>in</strong> urban environments where there are substantial<br />

constra<strong>in</strong>ts on right-of-way as well as added costs for mitigation of impacts. The railroads<br />

spent, on average, $1.5 billion annually for capacity expansion between 2005 and 2007.<br />

Assum<strong>in</strong>g that today’s freight mode shares cont<strong>in</strong>ue <strong>in</strong> the future, the Class I railroads<br />

will need to fund about $4.8 billion <strong>in</strong> improvements per year just to implement capacity<br />

improvements and chokepo<strong>in</strong>t relief and keep up with grow<strong>in</strong>g freight demand.<br />

Productivity improvements and <strong>in</strong>creased revenue from higher traffic volumes will<br />

generate $3.4 billion per year for <strong>in</strong>frastructure improvement leav<strong>in</strong>g the balance, an<br />

additional $1.4 billion, to be funded from public or other sources (AAR, 2007).<br />

There are several State and Federal programs that will fund rail improvement to help<br />

bridge the gap between <strong>in</strong>vestment needs and the availability of private capital. The<br />

Federal-aid highway fund<strong>in</strong>g program also allows some flexibility <strong>in</strong> us<strong>in</strong>g funds for<br />

nonhighway freight transportation projects. However, neither the railroads nor the States<br />

will fund chokepo<strong>in</strong>t improvement projects unless there is sufficient evidence that there<br />

will be an appropriate return on the <strong>in</strong>vestment. For example, Virg<strong>in</strong>ia will generally not<br />

fund rail projects unless they can measure an appropriately high (public) benefit/cost<br />

ratio. Resistance to the use of public funds may be overcome, as <strong>in</strong> Chicago’s CREATE<br />

project, with extensive analysis show<strong>in</strong>g the public benefits of responsible public<br />

<strong>in</strong>vestment.<br />

4-60

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