The Reading Viaduct was brought into use after the 2014 Christmas holiday, allowing fast trains on the Great Western Main Line to pass above slower trains crossing onto the relief lines west of Reading station. This picture was taken a few weeks later; the signals control movement from the three track into the station.
<a href="//commons.wikimedia.org/wiki/User:Geof_Sheppard" title="User:Geof Sheppard">Geof Sheppard</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>