The Minister of State for Road Transport and Highways, Shri Pon. Radhakrishnan informed the Rajya Sabha today that the Central Road Research Institute (CRRI) has conducted some performance studies using 3% natural rubber and 97% conventional bitumen for construction of some roads in the State of Delhi and on sea port to airport road in Kerala. The studies were sponsored by Rubber Board, Ministry of Commerce. However, no such studies have been conducted in respect of the National Highways.
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