b1-66er: (flashing lights, reflectivity and a very strong color contrast. Again.)
b1-67er: They clearly have a problem there. If self driving cars hang in there, it may drive new specs on emergency vehicles. Either frequency of flashing emergency lights, or wavelength of light so self drivers can readily identify them. My guess is the bright light is saturating a sensor, or overwhelming some averaging software. Maybe it fails if the sampling is in phase with the flashing.