"They might do some compacting with a steel drum roller, and as they approach the end they may run over that same asphalt with a pneumatic roller to improve the overall finish of the material." ...

This is followed by a steel drum roller to ensure the smoothness. The manipulation of the asphalt comes from ballasting of the pneumatic roller to achieve a specific weight. "The front four tires ...

Sakai's new Echelon Mode for SW884 and SW994 tandem rollers allows for closing proximity without reducing safety. Details ...