What is Lumicone? Lumicone is an emergency roadside device that uses a laser ray projector to display roadside markers and alert drivers of potentially dangerous situations along the road. Ordinary traffic cones are sometimes not enough to capture the attention of drivers during a roadside incident, especially at night. Lumicone uses a 3D laser beam to project the images of cones and safety triangles at regular intervals along the side of the road, providing drivers with a more eye-catching warning of upcoming problems. Lumicone can be preprogrammed with a variety of roadside markers and messages, and is great for signaling to drivers that they need to be careful around accidents, disabled vehicles, construction sites, highway patrol stops, and more.