â¹20 crore noise barrier recommended for Delhi flyover
The Central Road Research Institute has recommended using micro-perforated noise barriers costing â¹20 crore at a flyover being constructed along Delhi's Rao Tula Ram flyover. Noise reflective sheets costing â¹1.5 crore had been used in the older infrastructure. The noise generated at the flyover will reportedly increase to 78-82 decibels while the permissible noise level is 55 decibels.