By the end of the year, a 3D-printed bridge will be put to use in China for the first time.

Different     1     traditional bridges, its     2     (create) design doesn’t use reinforced concrete. It is made of a new material     3     (design) to weather rain and sun for     4     extended period, and that’s durable enough to meet national construction industry standards. If parts of the bridge become damaged, they can be   repaired     5     (separate).

The 15-meter-long footbridge in Shanghai,     6     will have service life of up to 30 years, will take 35 days to build, according to     7     (it) chief architect. The complex curved surfaces of the bridge can only be achieved by     8     (use) 3D printing technology. Based on laboratory testing, it can bear a load of 250 kilograms per square meter.

This isn’t the first time that a 3D-printed bridge     9     (make) in China. In July last year, Tongji University in Shanghai made the world’s first two 3D-printed pedestrian bridges.

    10    , that pair of bridges was only built as a demonstration, and not for actual use.

In the Wake of Uber’s Fatal Accident

The first pedestrian death has led some to ask whether the industry is moving too fast to deploy the technology.

The autonomous-car industry faces closer scrutiny and criticism after a self-driving Uber car killed a pedestrian in Tempe, Arizona, in March. Full details of the accident are unclear,     1     the local police department issued a statement saying that a woman     2     (strike) fatally after walking in front of an Uber car travelling in self-driving mode. Uber says it is cooperating with a police investigation and has suspended testing of its self-driving vehicles.

It is the first time a self-driving vehicle     3     (kill) a pedestrian, and the event is already causing some to question the pace     4     the technology is moving. Besides Uber, dozens of companies, including     5     (establish) car makers and small startups, are rushing to test experimental self-driving vehicles and autonomous systems on roads. These efforts have received blessing from local governments     6     the technology seems so promising and a safety driver is usually behind the wheel as a backup.

It is widely argued by experts such as Philip Koopman that autonomous cars will eventually be safer drivers than the average person, because the vehicles don’t get distracted. However, proving that safety may be time-consuming and some say the technology is being deployed too quickly. At a time when many have praised the technology as ready for large-scale deployment, “this is clear proof     7     it is not yet the case,” says Bryan Reimer, a research scientist at MIT. “Until we understand the testing and deployment of these systems further, we need to take our time and work through the evolution of the technology,” he says.

The accident comes amid     8     seemed like rapid progress on self-driving technology and a push to loosen legal restrictions. Just days ago, Waymo, Uber, and others had urged the Congress     9     (pass) legislation that would pave the way for self-driving cars in the U.S. The accident will most likely slow the passage of that bill.

So far, the public has showed little sign of turning     10     the technology, even after such incidents. “I am not really sure this is going to lead to a public worry or backlash,” says Kambhampati. “Because honestly, I thought there would be more of a backlash after the Tesla accident.”