Waymo's robotaxi service will open in Denver later this year due to the lack of snowfall, according to company officials. The company's AI machine-learning system draws data from other cities with higher snowfall. Colorado authorities have stated that the state will regulate the service once Waymo begins carrying passengers. In Denver, Waymo's vehicles have been operating since September with human handlers to develop their systems' ability to adapt to winter road conditions. The testing was done in part to address challenges posed by snowstorms that could confuse the sensors, causing disruptions. An AI-powered computer system operates Waymo vehicles’ steering, acceleration, and braking, and company officials say the vehicles are safer than vehicles driven by humans. However, Consumer Reports safety advocates have criticized Colorado's regulatory approach as "relatively permissive" compared to California.