Asphalt roller (IMAGE) University of Missouri-Columbia Caption Steam rises from the newly poured plastic waste pavement mixture as an asphalt roller compacts the mixture into a smooth driving surface along Stadium Boulevard in Columbia. Credit University of Missouri Usage Restrictions For media use. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.