New Delhi, Aug. 21 -- New Delhi: The Bureau of Energy Efficiency (BEE) has pushed back against a proposal by truck makers to use a homegrown testing tool in the upcoming fuel efficiency norms for heavy-duty vehicles, fearing a delay in implementation of its rules.

Three people familiar with consultations between the industry and government on the implementation of constant speed fuel consumption (CSFC) norms for heavy-duty trucks told Mint that truck manufacturers have favoured the use of Bharat Vecto, a new testing tool still being developed jointly by the ministry of road transport and highways (MoRTH) and the Automotive Research Association of India (ARAI).

Bharat Vecto stands for Bharat Vehicle Energy Consumption Calculation Tool, w...