Anna Salai Flyover: Design Changes Made Near Two Metro Stations

The ongoing Teynampet–Saidapet elevated flyover project on Chennai’s Anna Salai has undergone minor design changes in areas near two Metro stations. The changes were made to address site conditions without reducing the road space available for traffic.

The 3.2-km elevated flyover, being constructed at a cost of ₹621 crore, is designed to ease traffic congestion between Teynampet and Saidapet. Construction began after the foundation stone was laid in January 2024.

Since the flyover is being built above the Chennai Metro underground corridor, its design required detailed consultations with experts from Chennai Metro Rail, IIT Madras, and technical specialists from the UK and Germany.

Two-Pillar Design Near Metro Stations

During construction, officials found that the original design did not fully match the actual site conditions near two Metro stations. As a result, the design was modified for a stretch of around 426 metres.

The original plan included three supporting pillars, including one in the centre of the road. Under the revised design, the central pillar will be removed, with only two pillars placed along the edges of the road. Officials said this will help retain the existing road width and provide more space for traffic.

The design change has received the required approval from the Tamil Nadu government and is not expected to increase the project`s overall cost. Officials said the entire project is still targeted for completion by February 2027.

62% of Work Completed

So far, around 62% of the flyover project has been completed. Utility lines, including electricity cables, drinking water and sewage pipelines, and telecommunications connections, have been safely relocated at several pillar foundation locations.

The project has a total of 132 spans, of which 42 are located near Metro station areas. Special soil-strengthening work has also been carried out at 69 locations above the Metro tunnel corridor.

Despite challenges during construction, including delays in obtaining gas cylinders required for welding work, officials said the project is progressing as planned. A third-party safety and quality audit by IIT Madras is also being carried out.