MOUNTAIN VIEW, Calif.—Google unveiled a brand new self-driving car prototype on Tuesday, becoming the first company to build a car with no steering wheel, accelerator or brake pedal.

Here's what we know about the car so far:

• It's a two-seater, with "ample room" according to test drivers.
• It is available only in California, primarily near Google's Mountain View headquarters.
• The car is summoned by a smartphone for pick up at the user’s location with the destination set.
• There is no steering wheel or manual control, simply a start button and a big red emergency stop button.
• Powered by an electric motor with around a 100 mile range, the car uses a combination of sensors and software to locate itself in the real world. A GPS is used to get a rough location of the car, at which point radar, lasers and cameras take over to monitor the world around the car, 360-degrees.
• The car is limited to 25 mph, which restricts it to certain roads, but also minimizes the kinetic energy it could carry into a crash if one should happen.
• Google says the cars should be road-ready by early next year.

Read more of The Guardian's report—"Google's self-driving car: How does it work and when can we drive one?" - visit here.