Question

this sign means: divided highway ahead one - way traffic ahead four - lane highway ahead divided highway ends

Explanation:

The sign in the image is a traffic sign. Traffic signs are part of transportation infrastructure, which is related to engineering (a sub - field of Natural Science). The sign shows two arrows diverging, which is a common symbol for the end of a divided highway. A divided highway has a median or divider separating traffic in opposite directions. When the divided highway ends, traffic from both directions will be on a single roadway without a physical divider.

Answer:

Divided highway ends