; and (B) by striking illegal crossings in areas of high illegal entry into the United Sates and inserting , impede, and detect illegal activity in high traffic areas ; (2) in subsection (c)(1), by inserting and, pursuant to subsection (d), the installation, operation, and maintenance of technology after barriers and roads ; and (3) by adding at the end the following: (d) Installation, operation, and maintenance of technology Not later than January 20, 2021, the Secretary of Homeland Security, in carrying out subsection (a), shall deploy the most practical and effective technology available along the United States border for achieving situational awareness and operational control of the border. (e) Definitions In this section: (1) High traffic areas The term high traffic areas means sectors along the northern, southern, or coastal border that— (A) are within the responsibility of U.S. Customs and Border Protection; and (B) have significant unlawful cross-border activity. (2) Operational control The term operational control has the meaning given such term in section 2(b) of the Secure Fence Act of 2006 ( 8 U.S.C. 1701 note; Public Law 109–367 ). (3) Situational awareness defined The term situational awareness has the meaning given such term in section 1092(a)(7) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ). (4) Technology The term technology includes border surveillance and detection technology, including— (A) radar surveillance systems; (B) Vehicle and Dismount Exploitation Radars (VADER); (C) 3-dimensional, seismic acoustic detection and ranging border tunneling detection technology; (D) sensors; (E) unmanned cameras; (F) man-portable and mobile vehicle-mounted unmanned aerial vehicles