A sign that tells you there is a low place in the road ahead has the word, "DIP" sign on it.
These warning signs are designed to be used when there is a sudden rise or fall in the road's profile that is significant enough to create a hazardous situation that could cause significant discomfort to passengers, cause cargo to shift, or cause a vehicle to veer off its intended course at the posted maximum speeds.
In some places, it could be preferable to add an Advisory Speed plate to these signs.
At a brief length of clepressecl alignment where a vehicle could suddenly be hidden, the DIP sign is not to be used.
A no-passing zone should be implemented in such a situation.
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