The LOOK sign (MUTCD R15-8) reminds road users of the regulatory requirement to look both ways for trains before grade crossing. One should never assume that trains will always come from the same direction. Remember that trains can arrive at any time from any direction. Thus, always look and listen when crossing railroad tracks. LOOK Sign can be mounted as a supplemental plaque below the Crossbuck sign or on a separate post near the grade crossing on the railroad or Light Rail Tracks right-of-way. As per, Chapter 8 Figure 8B-1 of MUTCD, the sign must have black letters on a white background. Look sign must be a horizontal rectangular sign with a horizontal two-direction arrow above the word "LOOK."