Petroleum and petrochemicals major Reliance Industries may have to wait before it can begin construction of its proposed cargo airport at Jhajjar in Haryana.

The union civil aviation ministry wants to carry out a study to estimate the impact of the proposed greenfield project on the cargo facilities at the Delhi airport.

The Delhi airport is being expanded and modernised through a public-private partnership (PPP) model that includes provisions for expanding both its passenger-carrying and cargo facilities.

The ministry will give a green signal for the Jhajjar project only if the study to be conducted establishes that the existing facilities will not suffer from additional capacity creation.