Abstract: The present invention provides a traffic-signalling device suitable for providing information to oncoming traffic. The traffic-signalling device comprises a moveable member suitable for attachment to a support and a solar powered drive system. The moveable member is operative to move between a first position and a second position, wherein in the second position the traffic-signalling device is operative to provide information to oncoming traffic. The solar-powered drive system is suitable for causing the moveable member to move between the first position and the second position.