Watch as we follow one of Google's new self-driving cars (+15 photos)

The vehicles represent a big technical leap forward

A Google self-driving navigates streets near the company's headquarters in Mountain View, California, on June 26, 2015.

A Google self-driving navigates streets near the company's headquarters in Mountain View, California, on June 26, 2015.

Google's new self-driving cars are on public streets. After more than a year of development and testing, the new cars made their debut on the roads around Google's headquarters in Mountain View late last week, and I went to check them out.

The cars are a major technical leap forward from the previous-generation Lexus SUVs that Google has been using. Those were production cars with self-driving sensors and functions added, but the new cars have been designed and built from scratch by Google.

They weren't easy to find. Perhaps because testing is so new, I only saw them four times over the course of several hours on Friday and Monday outside the Google X research division. In contrast, scores of the previous-generation Lexus SUVs came past me during the same period.

But I managed to follow one car through the neighborhood close to Google X. Traveling at a steady 25 miles per hour, it was easy to keep up with.

Like many residential streets in Silicon Valley, the roads near Google X don't have lane markings and have lots of street parking. There's enough room for two cars to pass each other, but the Google car seemed to prefer driving much closer to the center of the street than a human driver might.

When it came up to an intersection, it moved a little to the right but then resumed its journey closer to the center of the street when it was through the junction. At one point, it approached a sharp curve while still toward the center of the street. An oncoming car might have had less room than usual to get by the Google car.

On a wider street without parked cars, the car did stay to the right-hand side of the road and successfully slowed to a halt almost exactly at a 'stop' marking on the street. Then it successfully navigated a three-way intersection and went on its way.

While its maximum speed wasn't a problem on residential streets, it was moving slower than the rest of the traffic as it headed down Middlefield Road on Friday. Its hazard lights almost continually flash as it drives, giving motorists a warning of its slow speed, and most simply overtook it, although it was obvious that some people slowed to get a better look at the car.

Both among neighbors I spoke to and in online comments on community message boards, many Mountain View residents seem excited that this cutting-edge research is happening in their town. Google's project has made Northern California something of a hotspot for self-driving car tests, and nowhere are more vehicles on the road than here.

The new cars are easy to spot thanks to their distinctive styling, which most agree is cute. The all-electric vehicle is small and rounded and has a front that resembles a face. If these are part of a diabolical scheme whereby machines take over the Earth, few people will see it coming.

Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service. Follow Martyn on Twitter at @martyn_williams. Martyn's e-mail address is martyn_williams@idg.com

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