A report by Arappor Iyakkam reveals massive road height violations across Chennai and Tamil Nadu, leaving residential properties vulnerable to flooding. Residents are facing massive financial losses due to improper construction practices.

  • Violations identified in 42 roads in Chennai and 203 stretches in other districts.
  • Improper construction is causing houses to sit below road levels, leading to flooding.
  • Contractors are bypassing mandatory 'cold milling' to save costs, raising road levels artificially.
  • Residents are spending up to ₹40 lakh to elevate their homes against flood risks.

Residents across Chennai and various districts in Tamil Nadu are raising alarms over the alarming increase in road heights following recent reconstruction projects. Using GPS-tagged photographic evidence, an anti-corruption watchdog, Arappor Iyakkam, has documented widespread height violations that are turning residential streets into flood traps.

The crowdsourced data, compiled by 157 volunteers, highlights 245 specific instances of violations. High-profile areas including C.P. Ramasamy Road, T.T.K. Road, Ashok Nagar, and Besant Nagar are among the hardest hit. Jayaram Venkatesan, convener of Arappor Iyakkam, noted that in areas like Mugalivakkam, homes have effectively sunk one to two feet below the current road level.

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Why This Matters

BozokMedia analysis shows that this is not merely a technical error but a systemic failure in urban infrastructure management. As road levels rise, they act as funnels, directing rainwater and raw sewage directly into low-lying residential properties during monsoon seasons. This creates a perpetual cycle of flooding and property damage for local homeowners.

When the road is raised, the platform reaches the same height as the road, upsetting the entire stormwater drain network.

The crisis is primarily driven by contractors routinely bypassing the mandatory cold milling process. Cold milling involves removing the top layer of the existing road before laying a new one to maintain a consistent elevation. By skipping this step, every new layer of asphalt adds to the total height, eventually making manholes and utility chambers dangerously sunken, which leads to frequent two-wheeler accidents.

The economic impact on citizens is devastating. The report highlights that many residents are being forced to spend exorbitant amounts—sometimes as high as ₹40 lakh—to elevate their ground floors just to stay dry. Furthermore, the physical barriers created by these height discrepancies pose significant risks to senior citizens and persons with disabilities.

Historical Background

In standard civil engineering for urban roads, maintaining the existing grade is crucial for drainage. The practice of 'milling' is a globally recognized standard to prevent the 'layering effect' that leads to the systemic flooding seen in rapidly developing urban centers like Chennai.

Did You Know?: Unmilled roads don't just cause flooding; they also lead to sunken manholes that are a major cause of road accidents.

Frequently Asked Questions

1. What is 'cold milling' and why is it important?
Cold milling is the process of removing the top layer of an old road to make space for a new one, ensuring the road height remains stable.

2. How are residents affected by these road height increases?
Residents face frequent flooding, high repair costs, and increased risks of accidents due to sunken utility chambers.