OneBusAway provides a mode optimized for showing real-time arrival information on large public screens, allowing quick and cheap information displays.
Photo by Atomic Taco.
To use sign-mode, use the standard web interface to browse to your favorite stop. The URL for the page should have form like:
http://your.host-name.com/where/standard/stop.action?id=X_Y
To enable sign mode, simply replace the standard part of the URL with sign:
http://your.host-name.com/where/sign/stop.action?id=X_Y
There are a number of parameters you can add to the URL to tweak the behavior of the sign: