(17 Apr 2016, 5:22 pm)Dan wrote Surely the system is in place to alert drivers to take caution, rather than to take evasive action to avoid a low bridge which isn't even on the route of that service..?

I would anticipate that drivers are informed of the various systems which are in place on buses in the training process or the mentoring process.

The training covers some of the low bridges you may encounter whilst driving. The low bridges near to the Metrocentre are certainly covered and your attention is drawn to one or two others you may pass on test.

(17 Apr 2016, 6:38 pm)citaro5284 wrote I cannot believe that people think having such a device fitted is a waste of time.

I know. As this thread primarily concerns the 'beeping' on the X1, I think its useful to examine the low bridges the service may encounter on-route. Off the top of my head, I can think of one which is the example near the Tyne Bridge. If the few 'beeps' near the Tyne Bridge prove to be an insurmountable distraction to the driver, then I'd suggest he or she is probably in the wrong profession as there numerous things more far more distracting than a sound warning of a potentially dangerous obstacle.