A two TFT pixel structure liquid crystal display includes a first and a second scan line, a first and a second signal line, and a pixel. The method includes indicating to a number of forwarding engines that a forwarding engine has completed a switchover operation and causing at least one of the forwarding engines to acknowledge that the forwarding engine has completed the switchover operation in response to the indication. The rail structure comprises one or more tracks oriented parallel with external wall sections made of metal, and a partition separating the external wall sections and comprising an intermediate wall made of an electrically conductive material.