NOVELTY - A warning device for a traffic land for warning a lane change is provided to warn a driver of a traffic lane change by using various methods.    DETAILED DESCRIPTION - A traffic lane warning device is installed on a yellow solid traffic lane and a white solid traffic lane in a direction of the width of the traffic lanes and directly contacts a vehicle. The traffic lane warning device includes a surface elastic member (11), a surface protruding member (13), an impact transmitting substrate (17), impact transmitting members, a piezoelectric ceramic device (31), a power generator, an impact sensor (23), a light emitting display device (25), a warning sound generating device (27), a surface transparent member (28), and a detection and display device. The surface elastic member is directly contacted the vehicle and receives an impact of the vehicle. The surface protruding member has a plurality of vertical protruding members externally formed from the surface elastic member. The impact transmitting substrate has a predetermined width and is provided at the bottom of the surface elastic member and the surface protruding member. An upper side of the impact transmitting substrate has the same shape as of the surface elastic member and the surface protruding member, and is attached to a side of the surface protruding member or spaced apart from the side. The impact transmitting substrate is made of a metal or a plastic having rigidity and receives an impact of the surface protruding member. The impact transmitting members partially absorbs the impact transmitted from the impact transmitting substrate and partially transmits the impact to the power generating member. The impact transmitting members includes a plurality of impact transmitting elastic members (19) made of one of a steel plate and a spring having elasticity. The piezoelectric ceramic device generates power from the impact of the vehicle transmitted to the impact transmitting member. The piezoelectric ceramic device is provided at the bottom of the impact transmitting member and transforms mechanical impact energy transmitted from the vehicle to electric energy. The power generating member includes a storage battery.