In these streets, lie some man-made structures with a problematic history: box culverts. For all latest news, follow The Daily Star's Google News channel. A concrete box designed to encase canals ...

One of them, a 100-metre bridge in Maduravoyal that links Poonamallee High Road, has four 1.5-ft-wide culverts that are all choked by garbage and water hyacinth, blocking the flow. Even at the ...