From Portland Oregon Police Bureau:

Everybody has a traffic stop story. For many people, a traffic stop is one of our only chances to personally interact with an officer. Thus, the impression is a lasting one:
“He was a jerk….”
“She had her hand on her gun when she walked up….”
“He was cool and only gave me a warning….”
For an officer, a traffic stop is a routine, often forgettable task. But it is also one of the most routinely dangerous, as officers usually have little idea if we are stopping Dad on his way to work or someone who just robbed a bank, willing to do whatever it takes to escape…..MORE