There is the common, high tech invisible roadsign which says "to turn left, start in the right hand lane and swerve across 5 lanes of traffic HERE"
The classic "the exit you needed was the last one" - often combined with the "no, I know we signposted the exit 5kms ago, but now you are nearer you just have to guess"
But this is one of my favourites, as it has a strong visual identity, clean meaning and is so common.
Yes, these high visibility red and white barriers cum signs are everywhere in Dubai, but most usually along both sides of 6 lane 120kph (+) highways.
Their meaning is always the same.
"If this red and white sign is in a lane adjacent to you car ON EITHER SIDE, the lane you are travelling in may - or may not - end suddenly, without any other warning sign or indicator, and at any time. It may merge with the next lane, or it may simply terminate. The precise location at which the lane terminates may change at random, and on a daily basis".