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Shinjiro Koizumi (2nd L), Parliamentary Secretary of the Cabinet Office poses for a picture beside the chairman of Robot Taxi Inc., Hisashi Taniguchi (R), the president of Robot Taxi Inc., Hiroshi Nakajima (2nd R), and the Mayor of Kanagawa prefecture Yuji Kuroiwa during an unveiling ceremony for the self-driving taxi, based on a Toyota Estima car body, in Yokohama, south of Tokyo, Japan, October 1, 2015. Robot Taxi uses a combination of radar sensors, millimeter-wave radar, image analysis on stereo vision cameras and GPS to determine the car's location. Image Credit: REUTERS

Tokyo: Toyota Motor Corp said it would aim to bring to market cars that can autonomously change lanes, merge with traffic, and overtake other vehicles on highways by around 2020 as it aims to catch up in the nascent field of self-driving cars.

Demonstrating its newest safety technology features to media on Tuesday, Japan's biggest automaker said in that car of the future, drivers would be able to turn on and off the auto-pilot mode with a single switch.

Toyota also said it would launch three models in Japan this year equipped with "intelligent transportation system" (ITS) technology, which allows vehicle-to-vehicle and vehicle-to-infrastructure communication to alert drivers to potential dangers using sensor technology.

The face-lifted Crown sedan unveiled in the domestic market last week was the world's first car to use ITS technology, Toyota said.

The fourth-generation Prius hybrid, due for launch in Japan at year-end, will be among the three models, it said.