New Yamuna Bridge (Naini Bridge)

The New Yamuna Bridge — locally known as the Naini Bridge — is a 1.51 km cable-stayed road bridge over the Yamuna at Prayagraj (formerly Allahabad), connecting the city to its southern Naini suburb. Opened in 2004, it was India's longest cable-stayed road bridge at the time and remains one of the country's most visually distinctive bridges thanks to its twin diamond-shaped pylons.

The bridge was sanctioned to relieve the chronically congested 1865 Old Naini Bridge (an iron lattice rail-cum-road structure that was reaching life-end). Construction by an L&T + Hyundai joint venture began in 1997 and completed in 2004 at ₹230 crore. Schlaich Bergermann Partner of Stuttgart provided the structural design with India's Bridge & Roof Co. as local consultants.

The diamond-shaped pylons were a deliberate aesthetic choice — they recall the confluence of three rivers (Triveni Sangam) at Prayagraj, Hinduism's most sacred bathing site. The central 260 m cable-stayed span has 26 stay cables on each pylon arranged in a fan configuration. The PSC box-girder deck is post-tensioned with bonded tendons in a longitudinal layout.

The bridge handles approximately 35,000 vehicles/day and was widened to six lanes in a 2018 retrofit. During the Kumbh and Magh Melas (held every 6 and 12 years at Prayagraj), it carries multi-fold pilgrim traffic and is closely monitored for vibration response.