# PENETRATION BITUMINOUS MACADAM

PENETRATION BITUMINOUS MACADAM Produced: 1930 Description Macadam roads are constructed in Massachusetts and Rhode Island. Crushed stone and sand are spread on road beds, rolled, and broomed to remove foreign deposits. A layer of bituminous cement is spread and rolled. Emphasizes the need for careful leveling of the various layers to prevent buckling and rutting. https://catalog.archives.gov/id/7338

- Kind: Educational
- Year: 1930
- By: National Archives
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/33-383)
- Licence or status: none stated by the archive
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/33-383?play=1)