A black and yellow striped road sign alerts you to a hazard. It means that there is a danger close to the road up ahead. You should be careful and alert when proceeding.
bhenchod
Don't empty the holding tanks... i.e. crappers.
A zebra crossing has a yellow bulb about 1 ft diameter on a black and white striped post at a height of about ten feet which flashes on and off about once a second, 24/7. That warning sign can be seen from distance by approaching drivers.
Yeld
It means traffic can pass on either side of an obstruction such as an island.
US standard traffic warning signs are yellow background with black symbols or letters. Traffic warning signs in other countries are generally white or yellow background with a red or black border in a triangular shape. Industrial warning signs are various colors, including OSHA and ANZI standards with orange background and black lettering. A yellow OSHA or ANZI sign would mean "caution" not "warning".
a 3 letter reasutrant with a black palm tree in a yellow triangle
yellow with black letters
A yellow Star of David was the sign of a 'Jude' or Jew.
Railroad Crossing
RegulatoryAdditional Information: (in the US) If it is black lettering on a white background it is regulatory.If it is is black lettering on a yellow background, and usually accompanied by a road condition sign it is advisory.