It would be nice to have some form of standby location a bit like a staging area but perminent it coukd cost 10,000 and you could send ambulance and police units there and it would not spawn any units there untill you assign a unit to stand by there
And it could generate missions like the stations do but maybe on a small scale?
SWAST in Central Gloucester (Glos, Chelt & Tewkes) have 3 ambulance stations but have approx 20 standby points (can't be certain until I'm in work).
I work happily pay 10k a standby where I can move vehicles around to better the response times.
I don't believe we should be building stations to represent standby points.