In handling this traffic, city planners face two dilemmas, says Geetam Tiwari of Delhi's Indian Institute of Technology.

在处理交通问题上，城市规划者遇到了两个难题，新德里印度技术研究所的吉他姆·帝瓦里说道。

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The research is in the International Journal of Internet Technology and Secured Transactions. [Rajesh Kumar Tiwari and G.

这项研究成果刊登在《网络技术与安全交易》国际期刊上。

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By mid-day, at Raja Ram Tiwari's Khoya Paya Shivir (Lost and Found Camp), some 4, 300 lost people have turned up.

BBC: A day at the Kumbh Mela festival

But Dr Richard Griffiths and Bela Tiwari of Oxford University have devised a technique to sex the endangered bird from minute samples of DNA taken from moulted feathers.

BBC: Brazil hunts for unique lost bird

"We have managed to reunite most of the lost people with their families, but we still have about 150 people waiting, " says Mr Tiwari's son, Umesh Tiwari, who is taking over the running of the camp from his father.

BBC: A day at the Kumbh Mela festival