The yellow and black traffic sign marks the road, what does it mean?

The sideways triangle-shaped sign is used to alert drivers to stick to the lane they are in and not pass cars ahead.

Ten shapes are commonly used to communicate with drivers on U.S. roads.The shapes combine with words, symbols, and background colors to let drivers know information such as maximum speed limits, when to stop or yield, the presence of road hazard and highway facilities and route markings.

The size, shape, color, and symbols used on road signs are regulated by the federal government.The guidelines for the design of roadway border edgings, crosswalks and bike lanes, as well as roadway signs and traffic signal devices, can be found in this publication.

The road sign is used to signal a no-passing zone.Drivers are not allowed to move into the adjacent lane to pass a vehicle in front in no passing zones.

There is a triangle on the road that tells drivers to stay in their lane.This shape is not used for other messages on the road.

Railroad warning signs are always round and only advance warning of a train crossing is conveyed on a round sign.A sign is used for railroad crossing.

Diamond-shaped road signs mean 'Warning' and stop sign shapes are only used to tell drivers to 'Yield' to other traffic at an intersection or lane merger.

There are signs with white and black colors that show regulatory information.Pentagonal shapes alert drivers to school zone signs.