Symbol 2796 from ISO 7000 - Title/Meaning: Obstacle warning system, side rear Function/description: On road vehicles: to identify the tell-tale or display that alerts the driver to obstacle proximity in their vehicle's blind spot as a warning for changing lanes or passing (overtaking) other vehicles; also activates if another vehicle drifts into the monitored area.
pay attention to orientation of symbolApplication referenced in: ISO 2575
Additional information: 
Symbol allows for mirror image to indicate left side warning.
Own work using: iso.org/obp/graphics/grs/a46ea847-fc49-43f8-accc-744e9ed4ff66 200.png
Vectorization:  Mrmw