The construction of pipelines along high-throughput fuel corridors can alleviate demand for rail, barge,
and truck transportation. Pipelines have a very different externality profile than other freight transportation
modes due to differences in construction, operation, and maintenance requirements; labor, energy,
and material input intensity; location and profile of emissions from operations; and frequency and magnitude
of environmental and safety incidents. Therefore, public policy makers have a strong justification
to influence the economic viability of pipelines. We use data from prior literature and U.S. government
statistics to estimate environmental, public health, and safety characterization factors for pipelines and
other modes