The success of noise barriers installed in the Bandra Kurla Complex (BKC) has compelled Mumbai Metropolitan Region Development Authority (MMRDA) to install noise barriers in all the Mumbai Metropolitan Region.
MMRDA has decided to install noise barriers on all the flyovers and Rail Over Bridges that have been and will be constructed in the near future.
In the first phase, flyovers that will be provided with the noise barriers are Sion Hospital Junction, Hindamata Junction, Thakur Complex, Malad Junction, Santacruz Airport Junction, Navaghar Junction and Dindoshi Junction which have already been thrown open to the traffic. The Rail Over Bridge at Dahisar has also been opened to the traffic recently and will be provided with the noise barriers to arrest the rising decibel levels owing to traffic movement.
The second phase of the project will see installation of noise barriers on flyovers at King’s Circle-Tulpule Chowk, Lalbaug Junction, Barfiwalla Junction and Suman Nagar Junction which are under construction and heading completion soon. The Milan Rail Over Bridge and the Sahar Elevated Road will also be provided with the noise barriers as they too are scheduled to be completed in 2011.
With the dramatic increase in number of vehicles, heavy traffic, residential developments in MMR region it is becoming necessary to install noise barriers beginning with the installing noise barriers at the ongoing infrastructure projects. Noise barriers are effective in reducing the impact of the noise pollution through different techniques and their combination's.
As a pilot project MMRDA has installed has installed India’s first ever noise barriers in BKC on the 1150 meter stretch from Kala Nagar to Income Tax Building junction. The 8.68 crore project has been implemented by MMRDA as per the guidelines issued by the Government of Maharashtra for providing noise abetment measures along the road side.
MMRDA undertook noise mapping exercise on the 4 km Bandra-Kurla Link Road. The study on the Noise barriers involved steps such as Noise Propagation Modeling, Acoustic Design and finalising material and type of the noise barriers. The MMRDA then after has begun to install the noise barriers in BKC.
The study also involved noise wave propagation and modeling the same to find out building-wise and floor-wise noise levels. The study also took care of the fact that the material that will be used for the barriers conform to European standards.
The barriers are made of expanded clay, PMMA sheets (to avoid opaque view) and perforated aluminum sheets. The noise mapping study was conducted by M/s. Metel-mecannica, Italy. The noise mapping study undertaken in the Bandra-Kurla Complex showed noise levels ranging from 65
to 98 decibels. However, after installation of the 5-meter tall noise barriers, MMRDA expected the noise levels to drop to acceptable limits of 55 decibels during the day time and well below 45 decibels during the night.
Furthermore, noise barriers are easy movable and can be installed wherever needed conveniently. Though noise barriers are lightweight, its powerful design system weakens the diffraction of noise. The Design of the solution is made in such way that no aftercare is required. Rain or moisture does not affect the functioning of noise barriers. Materials used in it are resistant to moisture and freeze.
The Authority will undertake a noise mapping study for all the flyovers, ROBs and Sahar Elevated Road; and install noise barriers on stretches depending on the necessity outline by the study.
The idea of Noise barriers is successful in many western countries. Noise barriers have been built in the United States since the mid-20th century, when vehicular traffic burgeoned. By the 1990s, noise barriers that included use of transparent materials were being designed in Denmark and other western European countries.