Riddle

I have got three eyes and all are in a straight line. When my red eyes opens, everything freezes. What am I?

Choose an answer

A.A stoplight
B.A crosswalk sign
C.A railroad crossing
D.Traffic lights
Hint: It's a 2-word phrase with 13 letters, starting with "T".

Answer

Traffic lights

Why this is the answer

A standard traffic light has three lamp 'eyes' lined up vertically, and everyone comes to a stop the instant its red light switches on.

This riddle is filed under "What Am I?" Riddles and rated Medium.