Just what there was missing! Thank you for creating this! However one little thing I would love to see. Those sirens that do not have an aditional rumbler, warn or horn maybe give them just a generic audio. Especially the horn. Maybe fill in the blanks with just a simple horn.
This is the weirdest coincidence and I am more than happy not having to code this myself. Just yesterday I was thinking about creating something like this based on the siren system in EmergeNYC. Little did I know someone would've already done it and was about releasing it THE NEXT DAY ^^
Fantastic mod all around! Not gonna ruin your rating for this but getting the AI to pull over when using the siren would be fantastic to see. A toggle bind between the four sirens would be great to see, but that's just nitpicking on my end, because I ran out of buttons to bind.