<p>Westbound Central line train describer - the green text is a scrolling message.
</p>
Alas, these are being replaced with a new type that has much smaller text that is very difficult to read if you are not standing directly below it
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47739225@N08">citytransportinfo</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/citytransportinfo/48456652087/">CentralLine-PID-CIMG0131</a>