Sorting installation, in particular for mail

A mail sorting installation, comprising:

• a plurality of conveyed item carriers circulating on at least one conveying mechanism for receiving, transporting and controllably delivering conveyed mail to assigned mail sorting containers;
• the conveyed item carriers being fastened on circulating transport carriages of the conveying mechanism;
• the transport carriages being guided by rollers on two profiles spaced from each other and extending in a transporting direction;
• the transport carriages being driven by an endlessly circulating transporting system;
• the transport carriages circulating on at least two vertically spaced upper and lower levels via at least one height-changing deflecting mechanism, a circulating region for the carriages on the lower level lying directly underneath a circulating region for the carriages on the upper level;
• on each level the transport carriages being taken along a row with sorting containers;
• and
• front and back sorting tracks being provided in both the upper level and the lower level and wherein the lower level front sorting track lies directly underneath the upper level front sorting track and the lower level back sorting track lies directly underneath the upper level back sorting track.