"The Delhi Metro Rail Corporation has ordered 131 more trains to cater to the additional traffic," DMRC spokesman Anuj Dayal said.

He said some of the these trains sets would have six coaches on those stretches which are very crowded. The number of passengers using Delhi Metro services crossed eight lakh-mark on Monday and on Tuesday for the first time, Dayal said, was 8.14 lakh.

The new trains are currently being manufactured and will be pressed into service as soon as they are ready, he said. The earning of the Delhi Metro from passengers revenue is around Rs 90 lakh per day, Dayal said. The average daily passengers traveling on Delhi Metro has been 7.26 lakh this month.