idea 1: emergency lights are able to flash in different intervals and order, instead of right then left then right then left, and so on.
my video shows one of the many settings you could have for the lights to flash:
idea 2: indicator lights flashes while the opposite is still lit.. you'll have your left light blinking while your right light is still on. this will prevent the alpha bug in SA from clearing the windows and any other part of the vehicle using alpha.
i'm aware the scripters are working on resources of great priority, dont consider this a feature that needs to be added with a deadline of 3 days.