Yes. Several available. Most have some kind of rudimentary accelerometer that sense the bike slowing down and turns on a solid bright brake light. Price usually around $40+. I thought I saw Garmin branded rear lights with brake light fixture and GPS functionality but the >$100 price tag and questionable safety benefits made me dismiss it. In actuality, I think brake lights on bicycles are of questionable good. But I'm all for bright rear flashing lights.