Was on the NJ parkway and was wondering, why it’s not smooth. The roads pavement kept alternating between a smooth asphalt to a rougher substance, probably concrete. Maybe I’m using the wrong term but I’m curious.
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concrete roadways are very expensive and their somewhat longer time between servicing almost never justifies itself. there’s almost always a tangible reason. probably because there’s something under the road. asphalt doesn’t support itself. the asphalt is a couple inches thick, but the worked earth goes several feet down.
in areas where you can’t do that, concrete is a popular option. water is a common enough problem. if the local utilities can’t go full depth, you can get bands of concrete roadway where they cross.
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