Since the launch of the test phase in February, the robot has learned to correctly identify half of the construction debris it is fed.

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When construction is finished, vehicle convoy test runs will begin to ensure the smooth running of the road when needed.

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The bigger test of Britain's taste for windowless pods will come with a new project starting construction this year at the Trocadero, a Victorian building in Piccadilly Circus that was most recently host to an amusement arcade.

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