In its July 2017 North American Crane Index report, construction research firm Rider Levett Bucknall (RLB) counted nearly 400 fixed cranes in use across 14 major North American cities, indicating continued, steady activity in the construction industry. Cities where crane counts have declined still have projects in the pipeline that could boost construction crane numbers once again. Demand for residential, commercial and mixed-use space is the primary driver of growth in metros that have seen an increase in the number of cranes.
http://www.constructiondive.com/news/report-crane-counts-flying-high-in-major-us-cities/448422/