I haven't seen anything on the forum or in official announcements on whether or not it will be possible to leave the lights running but turn off the sirens. It wouldn't make much sense to keep the siren blaring after stopping a vehicle and going up to the window to speak to the driver, for example. Does anyone know if this will be included with LSPDFR or if this feature will have to be included in an ELS-like mod (if this is even possible)?

Yes. It was already mentioned somewhere in a topic.

There is already a script for this I'm pretty sure.

I haven't seen anything on the forum or in official announcements on whether or not it will be possible to leave the lights running but turn off the sirens. It wouldn't make much sense to keep the siren blaring after stopping a vehicle and going up to the window to speak to the driver, for example. Does anyone know if this will be included with LSPDFR or if this feature will have to be included in an ELS-like mod (if this is even possible)?

it was implemented in early versions of LCPDFR so I don't see why not 

Thanks everyone! Sorry, I hadn't seen anything about it.

There is already a script for this I'm pretty sure.

Yep, the latest Simple Trainer comes with a option to "Disable Siren". It disables siren, but traffic still moves out of the way.

I want to see a mod/option where both siren & traffic reaction is disabled