A highway hazard marker is housed within a disc shaped high impact plastic housing, an upper portion of which is transparent. A plurality of LEDs are circularly disposed proximal to the side of the upper portion. A ring counter provides signals to transistors that sequentially drive the LEDs. Excitation...http://www.google.se/patents/US6486797?utm_source=gb-gplus-sharePatent US6486797 - Turbo flare hazard maker
