User blog comment:Monkeypolice188/GTA VI Ideas/@comment-25626630-20150528175324

Turn indicaters it would be nice to have turn signals on

For emergency vehicles an feature to just turn on the lights and then a feature to turn on the sirens. I have an idea how it could work push L3 once to turn on the lights push L3 again to turn on the siren (along with the lights of course) push L3 again to turn them all off.