When the staff activated the smart bus's automatic driving mode with a light press of the button, the vehicle detect the surroundings through the radar to ensure that there are no obstacles on the road, and then the bus slowly entered the pre-planned lane. The automatic bus freely completed the movements of turning, passing traffic lights, etc in the National Intelligent Network (Changsha) testing area which has the first smart bus line in China. The smart bus must undergo rigorous closed tests before it runs on the open roads.
At present, the biggest highlight of the testing area is under the full coverage of the 5G signal. The 5G network helps vehicles to process road conditions quickly, to achieve low-latency communication between vehicles and vehicles, and to improve the reliability of autonomous driving. Vehicles can smoothly carry out different kinds of tests with high bandwidth and low latency.
The project of Hunan Xiangjiang New District Smart Bus Demonstration Line has launched 4 smart buses with the line of 7.8 kilometers long in total. Smart buses will identify obstacles by sensors (such as laser radar, ultrasonic radar, millimeter wave radar, visual sensors, etc.). With the help of 5G signals in the testing area and open roads, smart buses are capable of making accurate judgments within 5 milliseconds. “Our smart buses can stably detect obstacles 100 meters away, with a smooth stop from the obstacle in 3 meters.”
5G network connection device is set every 400 meters on the road of the smart bus demonstration line in Hunan Xiangjiang New District. These networked devices are equivalent to our home network card and Wifi. The networked equipment collects vehicle driving information to the debugging center of the testing area, and it sends the command information to the vehicle. That is to say, this smart road connects the intelligent bus and the debugging center, and it provides decision-making basis for the intelligent bus.