a blind spot warning apparatus , system and method provide for an electrically - actuated blind spot detection sensor that is electronically or wirelessly connected to a programmable logic controller . the plc is then electronically or wirelessly connected to at least one electrically - actuated light - emitting fixture that can be affixed to the exterior surface of a first vehicle . the light fixture is positioned to be easily visualized by the driver of a second vehicle . visualization is accomplished by using letters , words , symbols or other warning indicia within the fixture to convey a visual warning to the driver of the second vehicle . light fixture actuation is controlled by the plc as to both the position of the second vehicle relative to the first vehicle and to the amount of time that the second vehicle remains in a particular blind spot position as detected by the detection sensor and processed via the plc .