Toyota Promises Driverless Cars On Roads By 2020

• A modified Lexus GS, was tested on Tokyo's Shuto Expressway, where it carried out a range of automated man oeuvres.

• It included merging into highways, changing lanes, and keeping inter-vehicular distance.

• The car uses multiple external sensors to recognize nearby vehicles and hazards, and also selects appropriate routes depending on where its going.

• It automatically operates the steering wheel, accelerator, and brakes to drive in much the same way as a person would. 

• The car can only be operated in the more straightforward driving conditions of a main road.