Chennai - the Capital City of Tamil Nadu being the largest city in South India and one of the four Metropolitan Cities in the Country is the hub of major administrative, industrial, business , commercial , Information Technology, educational and socio-cultural activities, resulting in rapid growth.
Maintenance of City Roads is one of the challenging and Important function of Corporation of Chennai. In the last few years, various steps were taken for the up gradation of roads in the City. Interactions were held with premier technical institutions in Chennai like I I T , Anna University and Highways Research Station to provide world class infrastructure facilities
Section 204 of the Chennai City Muncipal Corporation Act 1919 entails the Corporation of Chennai to maintain public streets, repair and make all improvements there to which are necessary or expedient for the public safety and convenience.
BUS ROUTE ROADS
In Chennai City 304 Roads to a length of 222 Kms are Bus Route Roads. Bus Route Roads Department of the Corporation of Chennai maintains and improves all the Bus Route Roads periodically. The Bus Route Roads are being re-laid once in 5 years using paver finishers. The relaying of Bus Route Roads consists of laying Compacted Bituminous Concrete(CBC) 40mm thick wherever the existing base is badly damaged the road is strengthened by laying base course with DENSE Bituminous Macadam ( DBM ) 50mm thick. The unit cost of laying the Bus Route Roads as mentioned above is Rs. 409/- per Sqm as per current schedule of rates. (2005-2006 )The hot mix required for the relaying work are prepared by the contractors in their centralized Asphalt plant located in the outskirts of the City and brought to the site by tipper lorries, and laid at the site using mechanical paver finisher and rolled with vibrator rollers and static rollers. The temperature of the mix at all stages are strictly adhered as per the MORTH Specifications This makes it possible to achieve uniform and smooth riding surface. The process of laying roads in this manner is also very fast and causes less hindrance to traffic. Inorder to avoid traffic disturbances, Bus Route Roads are normally laid during the night and is opened to traffic in the next morning. The entire process of relaying Bus Route Roads is being carried out in accordance with the specifications of Ministry Of Road Transport and Highways ( MORTH ).
Mastic Asphalt Concrete is being laid as a wearing course for a thickness of 25mm at all important junctions and signal points of the Bus Route Roads. Mastic Asphalt concrete is capable of withstanding the force generated when brakes are applied by heavy vehicles and the force generated due to initial wheel momentum. In order to avoid damages to the road surface due to the application of brakes, this special technique is being used.