The dedicated stretch of highway is between the 605 Freeway and Pioneer Boulevard.
The 42-year-old Powell of Torrance was an 18-year-veteran of the department who worked from the Lakewood Station.
Powell was shot and killed seven years ago Monday during a suspected hostage situation.
Baca called Powell a true friend who had a zeal for what he could be.
Powell is survived by his wife and four children.