One of the recent trends in recycling right now is all-in-one recycling. All the paper, plastic, glass, and metal waste goes into one recycle bin, which is sorted at the factory. The argument is that it requires fewer trucks to pick it all up.
Construction work is usually seasonal. Many crops can only be grown during specific times during the year. Retail clerk positions are often seasonal. Package delivery personnel are often hired during the holidays.
Within LTPP, the seasonal monitoring program (SMP) was initiated to measure pavement deflections and corresponding pavement temperatures on over 40 pavement test sections throughout the United States and Canada. The testing is conducted on half of the sections for one year, then on the other half the following year.