Chief Minister Ashok Gehlot were among the politicians who attended the cremation of Singh at Lalkothi cremation ground.
Singh (57), an IAS officer of the 1978 batch, was wounded when a speeding car hit him while he was returning home after a morning walk yesterday. He succumbed to his injuries at a local hospital later.
He has held several important positions like Chairman of the State Pollution Control Board, Principal Secretary in departments of forest, home, water resources, labour, sports and youth affairs and was a former District Collector in Churu.
Singh is survived by his wife and two daughters.