Re: Mass Art Dormitory
A lot of road work is done at night. When they were doing leak repairs in the Big Dig tunnels that was done at night.
Another reason is most people sleep at night, and they don't take kindly to an asphalt milling machine grinding roadway at 3 AM outside their window.
Some construction can be more economical at night, even with wage differentials, because you can shunt traffic away from the construction area.
A lot of the track work on the Northeast Corridor is done at night. That's why the late night train between New York and Boston is pulled by a diesel as the catenary is shut down for the night work to be carried out.