India, April 23 -- The National Highways Authority of India has begun pre-monsoon maintenance on the Delhi-Gurugram stretch of NH-48 and the Sohna elevated expressway to prevent waterlogging and hydroplaning, officials said on Tuesday.

Repairs, to be completed by May, include cleaning down-take piping to prevent leakage, lubrication of bearing structures to ensure crack-free roads, and anti-glare measures to reduce reflections on wet surfaces, officials said.

Officials said concessionaires appointed on 15-year contracts are mandated to inspect and repair drain pipelines and bearing fitments along the expressway at four-month intervals. However, residents flagged persistent leakages during rain spells, raising concerns over the effective...