? Bituminous Roadways, a Minnesota shingle processor, and the Minnesota Department
of Transportation are cooperating on research on using processed scrap shingles as
dust suppression on gravel roads. [11] Preliminary feedback has been positive; the
shingle scrap resulted in less dust, better driving conditions, and does not need frequent
re-application as do conventional dust suppressants. The firm is also exploring the use
of processed shingles top-coated with an emulsifier in low volume applications such as
driveways and parking areas.