northeaster17 t1_j9npb56 wrote on February 23, 2023 at 7:24 AM Reply to TIL of Macadam roads. These roads were convex, raised a few inches, and made of layered crushed rock; they were state-of-the-art for the 19th century. The rise of automobiles led to the dust issues that were solved by binding the roads with tar, leading to the invention of tarmac. by jamescookenotthatone Simon Winchester's book, " The Men Who United the State" gets into the early American roads. No one knew of those ancient roads. The had to learn from scratch. Permalink 2
northeaster17 t1_j7p7vea wrote on February 8, 2023 at 12:52 PM Reply to comment by Dyslexic_Devil in Alabama community rallies in support of a Black author after school district cancels Black History Month event by OregonTripleBeam Ask the Rethuglican party. Permalink Parent 7
northeaster17 t1_j9npb56 wrote
Reply to TIL of Macadam roads. These roads were convex, raised a few inches, and made of layered crushed rock; they were state-of-the-art for the 19th century. The rise of automobiles led to the dust issues that were solved by binding the roads with tar, leading to the invention of tarmac. by jamescookenotthatone
Simon Winchester's book, " The Men Who United the State" gets into the early American roads. No one knew of those ancient roads. The had to learn from scratch.