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Type I—Roads are paved or have an all weather surface and have grades that are negotiable by a normal touring car. These roads are usually narrow, slow speed, secondary roads. Type II—Roads require high-clearance vehicles such as trucks or 4-wheel drives. These roads are usually not paved, but may have some type of surfacing.
Dirt roads almost always form a washboard-like surface with ridges. The reason for this is that dirt roads have tiny irregularities; a wheel hitting a bump pushes it forward, making it bigger, while a wheel pushing over a bump pushes dirt into the next bump. However, the surface can remain flat for velocities less than 5 mph (8 km/h). [2]
Compared to sealed roads, which require large machinery to work and pour concrete or to lay and smooth a bitumen-based surface, gravel roads are easy and cheap to build.. However, compared to dirt roads, all-weather gravel highways are quite expensive to build, as they require front loaders, dump trucks, graders, and roadrollers to provide a base course of compacted earth or other material ...
This is a list of notable mainland settlements that are inaccessible from the outside by automotive roads (roads built to carry civilian passenger motor vehicles). These settlements may have internal roads or paths but they lack roads connecting them to other places.
The King road drag (also known as the Missouri road drag and the split log road drag) was a simple form of a road grader implemented for grading dirt road. It revolutionized the maintenance of dirt roads in the early 1900s. It was invented by David Ward King, who went by "D. Ward King" and who was a farmer in Holt Township, near Maitland, Missouri.
The sign for FM 1960, a farm-to-market road near Houston, Texas. Signs designating a Farm to Market or Ranch to Market road are a black square background containing a white shape of the state of Texas, with the words "FARM ROAD" or "RANCH ROAD" appearing in white text on the background and the route number in black text within the shape of ...