Google has officially geared its efforts into put self-driving cars on the road no later than five years from now.

Speaking on the development, director of the search engine company's driving car-project, Chris Urmson said the cars would still be test vehicles, helping Google collect data on how they interact with pedestrians and other vehicles, according to the Wall Street Journal.

Speaking further on the development, Urmson said that the company is still working on the sensors that detect the road signs and other vehicles, and the softwares that go into the handling of the data.

Speaking to reporters at Automotive News World Congress in Detroit, Urmson said the prototypes of these cars were built in Detroit by engineering and specialty manufacturing company Roush.

The company, which has brought together a congregation of automobile manufacturers and suppliers under one roof, said that the list of the makers of these vehicles will include General Motors Co, Ford Motor Co, Toyota Motor Corp, Daimler AG and Volkswagen AG, according to Reuters.

The Google self-driving car project was initiated when the company first started testing prototypes of autonomous cars. This vision became a reality only when Google unveiled to the public their prototype of their driverless car, which had neither a steering wheel nor a pedal, on May 28, 2014.

Although the option of such autonomous cars seems lucrative, there are many concerns raised about the safety of such cars, the authenticity of the cars and how they will be licensed. Speaking on the issue, a spokesperson of the agency said, "Just like any car built for use on U.S. roads, any autonomous vehicle would need to meet applicable federal motor vehicle safety standards, which falls under NHTSA's jurisdiction," according to the Wall Street Journal.

However, Google still hasn't given any information as to how it plans to make money on these cars.