Depending on your department’s policies, the following helps with subjects that bail out at the sight of red and blue lights.
When you are getting ready to stop a vehicle, call in the tag and vehicle description and a block number, business area or combination. I never activate my overheads with a mic in my hand. That job is done before I start the traffic stop. This gives you a slight edge of several seconds if your operator and passengers really don’t want to talk to you and decide to take off.