Stint
Likes Dirt
Totally agree. Not having done any homework on IMBA or UCI guidelines to see if this is a requirement, but if a safety Risk Assessment was carried out on the track, such warnings would be a suggested control measure to mitigate the risk.That said, incorporating some sort of warning on any of the larger features may not be a bad thing.
Some of the good examples I've seen have been:
* Double black warning of particularly hard features;
* Small flags at the lip of the jump;
* DROP for, you guessed it, a drop;
* I'm pretty sure its a double arrow side by side pointed down for a steep.