Find out for yourself if a steady yellow arrow is sufficient to clear a flashing yellow arrow.

The page simulates a nighttime event where you are stopped at a signal displaying a flashing yellow arrow, complete with lights simulating moving traffic. A driver at a flashing yellow must watch for gaps in oncoming traffic in addition to observing the signal. The signal shows a yellow reflecting border around the signal face. It helps the driver see the position of the lit yellow arrow. Watch the traffic again, and see if you can tell when the signal changes:

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can't read.
Big hidden text that you can't read.

flashing yellow arrow signal in the dark
can't read. can't read.
Hiding text in these places
makes all browsers render it the same.
Moving traffic on the road animation

can't read. can't read.
Big text that
you can't read.