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a UK pedestrian road crossing with traffic lights signalling red to stop the traffic flow when pedestrians are seen on the crossing by infrared detectors. The green signal reappears when no pedestrians are seen on the crossing
p(edestrian) u(ser) f(riendly) in(telligent) crossing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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