|  | The U.S. Federal Highway Administration has released a technical summary that provides an overview of the Universal Simple Aging Test, which is an alternative to the rolling thin-film oven and pressure aging vessel testing for asphalt binders. | 
|  | The U.S. Federal Highway Administration has released a technical summary that provides an overview of the Universal Simple Aging Test, which is an alternative to the rolling thin-film oven and pressure aging vessel testing for asphalt binders. |