The only possible second-or-third order effect of red cross-traffic arrows is to decrease the downstream traffic on the cross road. Mostly, the places where I encounter them have a low traffic cross road. IMHO, in those situations, red cross-traffic arrows are simply a failed "traffic engineering fad".
(Edited to fix a typo and generalize "red left-arrow" to "red cross-traffic arrow" to account for left-side-of-the-road driving systems.)
The only possible second-or-third order effect of red cross-traffic arrows is to decrease the downstream traffic on the cross road. Mostly, the places where I encounter them have a low traffic cross road. IMHO, in those situations, red cross-traffic arrows are simply a failed "traffic engineering fad".
(Edited to fix a typo and generalize "red left-arrow" to "red cross-traffic arrow" to account for left-side-of-the-road driving systems.)