Overview
- Hamburg's police began retrofitting patrol cars with the new Polizeiliches Präsenzlicht (PPL) on Tuesday, May 19, 2026, with phased deployment starting in western districts and the Landesreserve in Alsterdorf.
- The PPL is a non‑blinking blue LED built into roof light bars that runs at about 30 percent of normal brightness and activates automatically when a vehicle moves.
- Police say the PPL is purely a visibility measure to boost citizens' sense of safety and does not replace emergency signals; flashing blue lights together with the siren remain the legal command for road users to yield.
- Officers can switch the PPL off manually for covert or low‑visibility operations, and unions have backed visibility while calling for operational discretion and scientific evaluation of the measure.
- Hamburg presents the move as a German first and cites similar 'cruise' presence lights used in France, Spain, Sweden and parts of the U.S., but experts note limited and inconclusive evidence on crime‑prevention effects.