The industrial tissue of the department of Ain is also a result of its metal processing (cables, wire drawing, electrical wires) and engineering industry (automobile industry, France's most important site for truck production) as shows the presence of several major companies in this sector (Tréfileurope, Alcatel Cables, Renault Trucks). Foundry, metal processing and electrical industry occupy approximately 8,200 employees. Due to the diversity of the activities of these industries and their dispersion over the whole department, polarisation effects similar to those in the plastics sector have not yet been observed.