I work at SD, and this only applies if
1 - You are eligible to release cars at the impound
And
2 - Your at the station
I see a bit of a argument going on around here and I don't want that. Here's the honest reason that most PD and SD don't go to impounds, I can't speak for everyone but given my time on the force, while brief, I feel I can comfortably speak for the majority. As a deputy/officer we have lots of things to do while it's busy, like 911 calls, backups, pursuits and etc. when it's not busy we often do other things like paper work, speed traps, and interacting with the community or training. The problem is lots of these task involve us almost always being away from the station or being extremely focused on the paperwork or task at hand. So, when we see a impound notification, it makes no sense to stop what your doing to go check just to see if there's someone there. And after a while of this current system we have learned it's best for our time and duties to not check the impound. Now sometimes ill swing by if I'm in the area, but not if I'm in a speed trap across the state. Now, if there was a system like I was suggesting that told us what Impound people are waiting at, it would eliminate the fact that it's a 50/50 shot there's someone at your impound. I guarantee if the system im suggesting was put in place that any active unit, assuming there's not an active situation that needs urgent backup would be more then willing to release your car.
When we see an impound notification we don't just ignore it out of wanting to be lazy and make you wait, there's just better things we can be doing then taking the gamble. If a newer system that told us what Impound it's at, it would eliminate that gamble and make us much more willing to release you car.