By Anja Rammig, Tim Jupp, Kirsten Thonicke, Britta Tietjen, Jens Heinke, Sebastian Ostberg, Wolfgang Lucht, Wolfgang Cramer and Peter Cox.

ECONOMIST: Sources and acknowledgments

Peter Cox, chair of the society, said that if current trends of car usage in Cardiff continued, by 2026 the city's roads would be gridlocked.

BBC: Cardiff Civic Society in congestion charge plan

"A gentleman in both senses of the word, " former Dow Jones Chief Executive Peter Kann said of Mr. Cox.

WSJ: William Cox, Dow Jones Executive, Dies at 82