NEW DELHI, May 31 -- India's massive investment in highways and expressways is failing to translate into proportionately faster freight movement because trucks spend too much time waiting at warehouses, factories and logistics hubs, according to a year-long government study.

Nearly 70% of India's freight moves by road, making the system heavily dependent on trucking efficiency.

The findings have prompted the Ministry of Road Transport and Highways (MoRTH) to write to the Department for Promotion of Industry and Internal Trade (DPIIT), seeking measures to reduce loading and unloading delays that are undermining logistics efficiency gains from improved road infrastructure, according to two people aware of the development.

The study found...