For the swaying buildings, you'd almost certainly not get enough power out of it to make it worth the cost and additional complexity to install. For roads, wha

For the swaying buildings, you'd almost certainly not get enough power out of it to make it worth the cost and additional complexity to install. For roads, whatever power you generate from the traffic would be less than the additional power those cars require to drive on your road. It would be a net loss. Basically generating electricity from gasoline, with extra steps.