Traffic lights could become obsolete in 20 years, an engineer supporting a groundbreaking self-driving cars trial said.Thomas Tompkin of Smart Mobility Living Lab (SMLL) told the PA news agency a seismic shift in the way our roads are laid out is possible.Two self-driving electric cars built by Japanese manufacturer Nissan have completed hundreds of laps around a 2.7-mile route featuring busy A roads in Woolwich, south-east London during the past two years.
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