During a meeting with Chief Minister Mukul Sangma, World Bank officials asked the state government to expedite the process to ensure that the project did not derail.
Detailed project reports (DPRs) have been completed for about half of the total length and tenders have been floated only for about 200 km, official sources said.
A few hurdles were solved during discussions with the World Bank representatives, Sangma told reporters later.
The Chief Minister urged the World Bank to provide consultancy services to the state in preparing estimates and details of the plans.
PWD Minister Sniawbhalang Dhar said the government would appoint additional consultants to help the department in preparing the DPRs.