Step one:
First draw a ring using two circles.
Step 2:
Then draw your favorite numbers, decorations or arrows inside.
Step 3:
Draw a rectangle below.
Step 4:
Then draw a long shape through the rectangle.
Step 5:
Next, draw a horizontal rectangle as a fixation, and add texture to the middle rectangle.
Step 6:
Finally, apply a nice color, and the street sign is ready.