B28 bullet train: Key Features for UPSC

The B28 bullet train is being built for the Mumbai–Ahmedabad high-speed rail corridor. Its design brings together speed, accessibility and energy recovery; explore more science and technology updates.

Quick answer: BEML is manufacturing the B28 bullet train at its Aditya Plant in Bengaluru for the Mumbai–Ahmedabad corridor. The eight-coach train has a maximum test speed of 280 kmph, an operational speed of 249 kmph and capacity for around 557 passengers. The corridor’s priority section is targeted for August 2027.

What is the B28 bullet train?

The B28 is an indigenously manufactured eight-coach train intended for India’s Mumbai–Ahmedabad high-speed rail corridor. BEML is building it at its Aditya Plant in Bengaluru. Its test speed and operational speed are different figures, so candidates should distinguish them.

Why is the train in news?

The train is under manufacture as construction continues on the 508-km Mumbai–Ahmedabad corridor. The government has targeted the priority section for operation by August 2027; this is a target, not a confirmed opening date.

Meanwhile, the Union Budget 2026–27 announced seven new bullet train corridors. For related coverage, see the Delhi–Guwahati bullet train article.

What are its passenger and accessibility features?

The B28 bullet train combines two seating layouts with facilities for passengers with reduced mobility. Standard coaches use 3×2 seating, while the executive coach uses 2×2 seating.

• Accessible travel: The design includes level boarding, retractable footsteps, accessible toilets and space for two passengers with reduced mobility.
• Information: Liquid crystal displays provide information in English, Hindi and regional languages; Braille signage also supports accessibility.
• Emergency communication: Talk-back units in cabins and vestibules let passengers contact the crew. In addition, an onboard Wi-Fi-based system offers preloaded entertainment.

Two eight-coach trainsets can also be coupled to make a 16-coach formation. Each end has a driver’s cab with an Intelligent On-Board Control System.

How do the propulsion and design features work?

The train uses an alternating-current traction supply and regenerative braking to support energy-efficient operation. Regenerative braking recovers energy during braking, while a heavy compound catenary supplies traction power.

Engineers also used computational fluid dynamics to study airflow around the train. Its aerodynamic profile aims to reduce air resistance and tunnel pressure effects. Moreover, sound insulation and noise-damping coatings are intended to reduce noise.

Why does B28 matter for UPSC?

The project links indigenous manufacturing with high-speed transport infrastructure and applied science. For Prelims, the distinction between test and operational speeds matters; so do regenerative braking, accessibility and the corridor’s geography.

Source: Indian Express, 1 November 2026

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