Leaf blowers noisy dirty and unhealthy
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Huge machine lays asphalt street

Huge pneumatic paver lays asphalt street

Watch video and interview here. An operator high atop a pneumatic asphalt paver was assisted by two "back men" (otherwise called a screed or back end operators) at the rear of the machine on a little platform slightly above street level and by a crew of about 10 holding rakes, "lutes"and shovels laying down new street "mat" in northwest Philadelphia, Chestnut Hill. One back man who has been with the streets department since 1997 explained how this new half a million dollar computer-enabled paver is much superior to the 1996 model he originally worked with. He can monitor the job on a 7 inch display as the paver lays down what appears to be a couple inch thick layer of hot steaming asphalt and smoothly seam in a new section to an existing one, in automatic or manual mode turning the levels. It's important to regulate the speed, depth of material and and create a proper crown proper sloping down to the curb edge for rainwater to drain off. And a good back man, he says, makes less work for the foot crew who finish off the leveling work.