One of the great challenges for me is modeling realistic roads in Z scale. Before asphalt and cement roads were dirt, gravel, cobblestone pavers or brick. The likely road surface around 1900 in the country was dirt which varied greatly in color, width and smoothness.
The attached photographs give a glimpse of what a country road in a farming community would have looked like including cattle and horse dropping and the texture of wagon wheels in mud plus the occasional appearance of leaves blown against a wall.
Photo 1: Hille. Strasse
Photo 2: Hille. Strasse
Photo 3: Strasse. Apotheke (pharmacy presumably to the left)
Siding: Noch offers numerous choices for roadway construction including, gravel, cobblestone, and asphalt. Check out ZScaleHobo.com for these and other offerings from Noch.