When you have a curve that is dangerous, it is important to warn drivers. This sign can be a life saver and at least help prevent needless accidents. Also consider a W13-1 M.P.H. sign to inform drivers of the correct speed when approaching the curve.This is not the cheaply made signs that some web sites offer. This sign meets the Federal guidelines in the MUTCD. For questions about what sheeting type and/or size is good for you, please see our Suggested Usages section below.