Final answer:
The article in Transportation Research Part E-journal is focused on transportation, discussing the environmental impacts of transportation systems and potential mitigation strategies.
Step-by-step explanation:
The topic of the article in Transportation Research Part E-journal is transportation. This is indicated by the journal name and supported by the context given that refers to transportation systems and the challenges they present, such as the contribution to emissions from the use of fossil fuels for transportation. Further, solutions such as the use of carbon-efficient fuels, improving fuel efficiency, and reducing the need for travel are discussed. These points are underscored by various methodological approaches mentioned in the article, including transportation planning, issues associated with commuting, and the significance of environmental impact due to transportation to form an argumentative research project. Therefore, the student can expect the journal article to delve deep into aspects of transportation systems and their effects on the environment, as well as potential mitigation strategies.