Communities of color tend to have more roadways and more VMT from (wealthier, non minority) folks passing through (vast AQ EJ lit).
Thus, it is not surprising that majority minority neighborhoods would have more red light tickets issued. But it is unclear the demographics of the person receiving the ticket.
Did propublica get the zip codes / demographics folks being ticketed, or those where the ticket was issued? Latter is simple to get, former not so easy.