TRB Transportation Research Circular E-C168: Artificial Intelligence Applications to Critical Transportation Issues describes artificial intelligence (AI) applications in transportation and includes opinions on the future of AI by members of the committee that produced the report.

The circular also contains 12 individually authored articles that describe five general AI areas: traffic operations, travel demand modeling, transportation safety and security, public transportation, and infrastructure design and construction. Each article details the types of problems to which the AI paradigm may be best suited, its strengths and weaknesses, examples of applications, and suggested guidelines for its applications.