The United States is rapidly constructing a "smart wall" along its border with Mexico, a project that integrates 30-foot-tall steel fencing with sophisticated technology, including sensors, cameras, and surveillance towers. This initiative, a significant priority for the Trump administration, has received a substantial funding infusion from Congress.
Customs and Border Protection (CBP) Commissioner Rodney Scott described the project as more than just a physical barrier, stating it is designed to "maximize the use of our most valuable resource, which is our agents." The technology is intended to complement the physical structures, enabling Border Patrol to survey territory more effectively and freeing up agents for other duties.
As of mid-June 2026, CBP reports having erected an additional 74 miles of fencing, with plans to build hundreds more. Approximately 535 miles of the 2,000-mile border are not slated for physical walls due to natural barriers presented by rugged terrain; in these areas, ground sensors and towers will be employed. The agency is also retrofitting existing wall sections with enhanced technology, lighting, and roads. Along the Rio Grande in Texas, 12- to 15-foot-long cylinder-shaped buoys are being deployed to deter crossings.
The increased reliance on technology represents a broader transformation of CBP into an intelligence-driven operation with a vast surveillance network, a shift that has been underway since September 11, 2001. This includes the deployment of autonomous surveillance towers capable of analyzing visual data using artificial intelligence to detect suspicious activity and alert agents. The recent congressional spending bill mandates that CBP acquire only these autonomous towers, with an additional 95 units being deployed.
Underground fiberoptic cables are also being installed to detect movement, with data processed by AI. Companies like Sintela are involved in installing these systems, which can operate in diverse terrain. CBP also utilizes ground sensors and trail cameras to monitor smuggling routes.
However, the extensive deployment of technology has drawn criticism. Advocates argue that the "smart wall" militarizes the border and negatively impacts local communities. Ricky Garza, border policy counsel at the Southern Border Communities Coalition, noted a "massive expansion of surveillance and surveillance technology across the borderlands," asserting that "the wall in all its forms is harmful to communities."
Concerns have also been raised about the potential for these technologies to push migrants toward more perilous routes and to infringe upon the privacy rights of border residents. Some landowners have reported the placement of sensors and cameras on their property without consent. The Electronic Frontier Foundation has described the border area as a "hostile environment" for both locals and migrants due to the pervasive surveillance.
The significant financial investment in the wall project has also faced scrutiny. The watchdog group Taxpayers for Common Sense has questioned the cost-effectiveness and transparency of the spending. This mirrors past initiatives, such as a "virtual wall" project under the Obama administration that was ultimately canceled due to cost overruns and technical issues. CBP has denied claims of a lack of oversight, citing existing "oversight mechanisms."
In areas like Big Bend, Texas, where construction plans initially included a 30-foot bollard wall, opposition from local coalitions and bipartisan groups has led to revised plans. CBP now intends to install patrol roads and vehicle barriers, along with detection technologies, rather than the tall steel fencing in sensitive park and wildlife areas. Despite these adjustments, concerns persist among residents regarding the potential environmental and community impacts of the ongoing border security enhancements.