I see flashy lights on the highway and I can’t tell for sure what’s going on I for sure slow down <40 mph because for all you know they could be up to anything

I see flashy lights on the highway and I can’t tell for sure what’s going on I for sure slow down <40 mph because for all you know they could be up to anything that requires you to come to a complete stop. Especially if the blinding lights are especially blinding.