Speed Spots is a portable speed bump system developed to quickly and easily reduce traffic speeds in utility work zones, construction zones and more. The lightweight, easy-to-handle Speed Spots, made from recycled rubber, are intended to be placed in a staggered pattern across lanes to reduce traffic speeds. They are sold in packs of eight, and the company recommends six to eight Speed Spots per lane. Each Speed Spot weighs 6 pounds. Their built-in handle makes it easy for anyone to carry four at a time. www.speedspots.net