Maybe there's too much LED and Xenon light on scene -- potentially blinding or distracting motorists. Too much red. Not enough amber. You drive where you LOOK!
There are recommendations I have read, that would drastically reduce warning lights, once traffic control is established.
Please take a moment and read the linked presentation.
I-95 Corridor Coalition › Gui...PDF
WARNING LIGHTS, PARKING and SCENE SAFETY
https://i95coalition.org/wp-content/uploads/2015/03/Guide_Clear_RF.pdf%onscene.us