ScienceModern trafficTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceGudrun Heise12/20/2017December 20, 2017The French police are getting help from above to spot dangerous drivers, and London's public transport authority is also using new technology to make it easier for people to move about. https://p.dw.com/p/2pgXjAdvertisement