Delhi's Ageing Flyovers: A Network Under Strain, 17 Flagged for Urgent Repairs
On a weekday afternoon, traffic flows steadily across the bustling Nehru Place flyover, a structure that has served the city for over two decades. However, a closer inspection reveals telltale signs of ageing: cracks mar the road surface, and expansion joints emit a rattling noise as vehicles pass over the busy commercial district below. This scene is emblematic of a broader issue facing Delhi's infrastructure.
The Rise of Flyovers and Current Challenges
Delhi's reliance on flyovers began in the late 1980s and 1990s as traffic congestion surged. Planners turned to elevated roads to manage overflowing junctions, with a significant construction push in the early 2000s under the Sheila Dikshit government, spurred by preparations for the Commonwealth Games. According to Public Works Department data, more than 47 flyovers and bridges were built during this period, including key structures at Punjabi Bagh, Raja Garden, Africa Avenue, Savitri, Nehru Place, Andrews Ganj, AIIMS, Britannia Chowk, and others up to Mukarba Chowk in 2008.
Today, with 102 flyovers criss-crossing the city, a recent survey has identified at least 17 requiring urgent repairs. Earlier approvals were granted for works at Shahdara, Loni Road, Nangloi, Chirag Dilli, Okhla, Janak Setu, and Pul Mithai. The long-delayed repair of the Sarita Vihar flyover, constructed in 2001, commenced last July, while safety audits have been ordered for Seelampur and Zakhira flyovers. As Delhi plans an additional 10-12 flyovers, the condition of the existing network serves as a critical reminder: while building elevated roads quickly eases congestion, consistent maintenance is essential for longevity and safety.
Spotlight on Trouble Spots: Nehru Place and Beyond
While the ageing Maharaja Ranjit Singh flyover on Barakhamba Road has long been noted for its deterioration, the Nehru Place flyover is emerging as another significant concern. Designed to alleviate congestion around the commercial district and Chirag Dilli-Kalkaji junction, it enhances connectivity between Greater Kailash, CR Park, Kalkaji, and other south Delhi areas. Yet, sections now display pockmarked asphalt and missing concrete panels.
Traffic and road expert PK Sarkar, a former professor at the School of Planning and Architecture, explains that such wear is typical for ageing flyovers bearing thousands of vehicles daily. "Expansion joints are usually the first to take the hit," he notes. "Constant vehicle movement loosens metal plates and rubber seals. Over time, rutting appears on the surface—depressions formed by repeated tyre pressure."
Construction flaws can manifest years later. "Errors in the bituminous mix may lead to premature cracking or potholes. Water seepage can weaken underlying layers, while bearings and deck slabs undergo structural stress. Regular inspection and resurfacing are therefore critical," Sarkar emphasizes.
Visible Signs of Deterioration Across the City
During a drive across Delhi, signs of wear were evident on multiple flyovers:
- At the Modi Mill flyover, asphalt showed blistering—small bubble-like swellings caused by trapped air or moisture pushing up the surface layer.
- The Zakhira flyover approach stretches were dotted with potholes.
- Similar deterioration was visible at Sarai Rohilla.
- In some areas, side railings or noise barriers were missing, compromising safety.
Everyday safety gaps also emerged. On most stretches, lane markings were barely visible, increasing risks of sideswipes or sudden braking, especially during high-speed travel or rain. Patchy or absent signboards left motorists uncertain about exits or lane changes until the last moment. Additionally, the absence or sudden disappearance of auxiliary lanes forced vehicles to merge directly into fast-moving traffic, creating sudden bottlenecks.
Individually, these issues may seem minor, but on flyovers where vehicles move faster and corrective space is limited, they significantly impact safety and traffic flow.
Expert Recommendations for Maintenance
For Sarkar, the solution lies in disciplined, routine maintenance rather than dramatic interventions. He outlines a structured approach:
- Initial Checks: Within the first three months, basic elements like railings, noise barriers, lane markings, central verges, and pavement conditions should be inspected.
- Early Stress Signs: After about a year, engineers should look for early indicators such as cracks or rutting on the surface.
- Structural Reviews: Every five years, a deeper structural review and strengthening should be conducted where necessary.
Sarkar adds that vehicle-load assessments every six months are equally vital, as heavy and uneven traffic loads often trigger rutting and cracks. Despite these recommendations, the Public Works Department has not responded to queries regarding the list of flyovers identified for repairs, timelines, inspection findings, or repair plans, highlighting ongoing challenges in infrastructure management.
