the Administrator shall, if appropriate, revise FAA guidance to incorporate the findings of the study conducted under subsection (a) to assist airports and State and local departments of transportation in increasing airport capacity to meet regional air travel demand. 766. Study on autonomous and electric-powered track systems (a) Study The Administrator may conduct a study to determine the feasibility and economic viability of autonomous or electric-powered track systems that— (1) are located underneath the pavement at an airport