Pedestrian crossings on the motorway, separate speed limits for each lane, traffic signs with Chinese characters – traffic in China differs from that in Europe or the USA in many aspects. That is why China requires foreign motorists to have a Chinese driving licence. Automated and autonomous vehicles also have to prove their fitness for this market in advance. Mercedes-Benz started the ‘Intelligent World Drive’ at the Frankfurt International Motor Show (IAA) in September to adapt more highly automated driving functions to national user and traffic practices. After the start in Germany, the test vehicle based on the new production S‑Class Saloon is now being put through its paces in test drives in the heavy traffic and exposed to the special national features in the Chinese megalopolis of Shanghai in October. The test vehicle will face different traffic situations on five continents until January 2018 and will also gauge the limits of current systems in the process. The aim is to gather global insights in real-life traffic for the advancement of the technologies.
Urban traffic is one of the biggest challenges on the road to autonomous driving. Automated driving functions must be able to master highly complex traffic situations, which can differ greatly around the world to boot. The focus of the test drives in Shanghai is on assessing the driving behaviour in extremely heavy traffic with its different participants, as well as on infrastructure peculiarities.
Peculiarities in Chinese traffic
The high density of cars, two-wheelers, three-wheelers and pedestrians and the associated traffic behaviour in Chinese cities pose different requirements on automated driving functions than in Europe or the USA. In addition, there are road signs with Chinese characters and lane markings, which in China have different or even multiple meanings. For example, short white lines, known around the world as pedestrian crossings, can also be found on motorways. However, they don’t denote a pedestrian crossing, but the minimum distance between vehicles. The sensors must be able to recognise this and interpret it correctly. The same is true for speed limits, which can differ from one lane to another. Another challenge: Parking spaces come in many different shapes and frequently are full of obstacles that are hard to detect for sensors.
These special national features show how important it is to gather worldwide insights into real-life traffic on the road to autonomous driving and to adapt automated driving functions to the particular traffic practices and conditions. In the past seven years, Mercedes-Benz conducted about 5100 test drives around the world with 175 test mules for validations of driver assistance systems in the field alone. The performance of the driver assistance systems was assessed on some 9.5 million kilometres in Europe, the USA, China, Australia and South Africa, and more than 1.2 million measurements were made especially in real-life traffic situations for their continuous advancement.
Source: Daimler AG