Which ArcGIS platform application allows a user to store multiple maps and layouts in a single file for a large scale transportation project?

ArcGIS Pro is designed to support advanced mapping and data visualization, making it suitable for complex projects such as large scale transportation. One of the key features of ArcGIS Pro is its ability to work with projects, which can encompass multiple maps and layouts stored within a single project file. This organization facilitates project management, allowing users to easily switch between different maps and layouts as needed.

With its modern user interface and comprehensive suite of tools, ArcGIS Pro enhances workflow efficiency, particularly for extensive projects involving various datasets and map presentations. The capability to save multiple maps, layouts, and associated data in one file streamlines collaboration among project team members and helps maintain organization throughout the project lifecycle.

Other ArcGIS applications, such as ArcMap, do allow for mapping and layout creation but do not offer the same level of integrated project management functionality. Applications like ArcReader and ArcGIS Earth are geared more towards viewing and navigating maps, lacking the robust project structure that ArcGIS Pro provides. This makes ArcGIS Pro the optimal choice for the specified large scale transportation project.