Their official name is pneumatic road tubes.
These tubes are flexible rubber tubes stretched across a roadway. They work by compressing air as vehicles pass over them. Pressure change reveals much information as it is sent to data collection devices.
Some folks love it, others hate it, some don't know what to think of the faux Prada store 35 miles outside of Marfa, Texas. Regardless, it's now become the focus of the debate on freedom of expression versus advertising, and the Texas Department of Transportation has now classified it as 'illegal advertising'.