Tantech Holdings Ltd. announced the launch by its subsidiary, Shangchi Automobile Co. Ltd. of two highly innovative driverless and autonomous street sweepers. The Shangchi SC-120A model features unmanned, automatic sweeping, and the Shangchi SC-120B model features manned, autonomous, intelligent sweepingle. Its innovative driverless and autonomous street sweepers being launched, were designed for quieter operation and improved cleaning performance, with the ability to reduce or eliminate the 7 to 8 humans required for typical sweeper vehicle operation. Lidar-based, machine vision technology will enable the driverless model to safely and accurately operate in common environments. The sweepers have two primary operating modes, cleaning and litter-collecting, and can be used for 10 hours at a time or until full. The multi-patented vehicles will come with 1 year warranties.