Going by media reports, the balloons would be able to surveil multiple vehicles simultaneously, even during night or rough weather conditions. Plus, their controllers will have the flexibility to adjust the location to get a better view of potential suspects.
As of now, a total of 25 advanced surveillance balloons are covering an area of 402km, flying over portions of six American states - South Dakota, Minnesota, Iowa, Wisconsin, Missouri, and Central Illinois.
The tests had started last month and will continue until September, according to The Guardian report.
Perhaps, after September, the Pentagon will expand the test to other regions too.
Officially, the balloon program is for tracking criminal activity (like where suspects fled after an incident), but there are some concerns of a privacy breach.
According to experts cited by the Quartz, the balloons are being used to collect all kinds of data from the road, like "who's driving to the union house, the church, the mosque, the Alzheimer's clinic."