People are moving toward the urban cores of our cities in record numbers. And while cities are pushing inward, it?s becoming harder than ever to have a car?or multiple cars?in a household. Meanwhile, new subways and rail lines require deep pockets and often controversial funding sources. The solution, as some see it, is the automated (or semi-automated) city bus. A bus ticket is hardly an aspirational purchase for middle-class American consumers, yet two aspirational brands?Mercedes-Benz and Tesla?both recently mentioned bus projects intended to address the urban mass-transit dilemma.
It makes sense. Moving people on buses networked with the traffic signals might ease gridlock without making other (far costlier) changes such as building new subways or light-rail lines, or adding politically loaded policies like urban-area tolling for private vehicles. According to the Union Internationale des Transports Publica (UITP), an international organization for transport authorities and operators, a single, large articulated bus could replace 40 personal vehicles and take up just one-eighth of the road space. The Mercedes-Benz Future Bus, a semi-automated city bus with a technology suite called CityPilot, is a front-runner in this field. It can journey up to 12.4 miles (20 km) without a need for the driver to touch the steering, accelerator, or brake pedal. With a dozen cameras plus long- and short-range radar systems monitoring the route ahead, the Future Bus can spot obstacles and...