Railway Minister Lalu Prasad will be setting up a camp office at 1, Anne Marg, Patna, which happens to be the official residence of his wife, Bihar Chief Minister Rabri Devi.
Yadav has also informed ministry officials that he would be spending no less than 15 days in a month in Patna.
The matter has not come as a surprise to railway officials, who have got used to an absentee minister. Yadav took over the ministry on May 24 and left for Patna on his "rail yatra" soon after.
He has barely made it to his office since. The only regular office appearances that he made was during the Parliament session, after which he has been busy tying up matters in Bihar.
Many officials managed to meet him only while he was on his way to Mumbai after the Matsyanadhi Express derailment. The number of days he has attended office since the end of the Parliamentary session is just six.
Senior railway officials say the impending Assembly polls in Bihar is the reason why Yadav is absent from Delhi before the presentation of the Railway Budget.
"In any case, ministers only give direction, the actual drafting is done by bureaucrats,"