Can you tell the difference between these two signs?

For your written knowledge test you are often asked to identify a number of common road signs by shape, color, symbol, or message. Even if these two signs aren't in you state's drivers manual or on the official DMV test it is a good idea to understand the difference between them.

Results on practice tests released by driversprep.com suggest that only two out of three test takers manage to tell them apart.