Freight Priorities Act - Declares the policy, objectives, and goals of the United States for improving the efficiency, operation, and security of the national freight network by leveraging investments and promoting partnerships that accomplish specified results.

Requires metropolitan planning organizations to involve public port authorities in metropolitan freight transportation planning.

Authorizes the Secretary of Transportation (DOT) to establish: (1) measures to assess the performance of a multimodal freight network in accordance with the national freight strategic plan, and (2) a pilot program for up to five urbanized areas to develop and deploy one or more pilot measures and targets to improve multimodal freight movement in densely populated and congested urban areas.

Directs the Secretary to: (1) establish and support a national cooperative freight transportation research program, and (2) offer to enter into an agreement with the Transportation Research Board of the National Research Council of the National Academies to support and carry out administrative and management activities relating to governance of the research program.

Requires the National Academies to select an advisory committee consisting of a representative cross-section of freight stakeholders, which shall recommend a national research agenda for the program.