The placard has proven to be helpful. The placard lets the officer know that you support their efforts and that you have been trained on how to interact with the officers.
It is meant to slow things down and bring about sense of safety between you and the officer. After all, who travels with a police placard? Most likely someone who is connected to law enforcement improvement and someone who supports officer safety.
The placard is to be displayed on the driver side of your dashboard to easily be seen by an officer.
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