Show Du dustless highways increase 1 l the rapidity with which the imeri amert can people are turning to the dustless dust lesa highway Is shown in figures recently compiled from reports to the united states bureau of mines the tha figured show that in the last eight years yean tons of asphalt and asp haltia materials have gone into american highways a quantity sufficient for miles of roads and streets the tha treated highways la in the th united states it connected in one on great roadway sixteen feet wide would twice circle the globe |