Passenger rail between two cities is being considered, with studies outlining potential requirements. A significant investment of $13 billion may be necessary for this project. Alternatively, a route that Union Pacific resists could be used.

Further details about the proposed rail line and its potential challenges are available from the source. The studies provide insight into the potential costs and obstacles associated with the project. More information can be found through the source, which has reported on the studies and their findings regarding the passenger rail proposal.