Sky-wheels based Urban transport-Skybus

B.Rajaram M.Tech.,F I E., F N A E., IRSE (Retd) Former MD Konkan Railway Inventor Anti-collision/ Skywheels technologies

Original Paper presented by the inventor in Bolgna, Italy 1989

INDEX       Hyderabad Skybus Metro Rail Current Status

Test Track at Margao Goa-Dec 2004

Short technical advisory on Environment friendly Skybus Std. Gauge Metro Rail

( Published on 12th Jan 2007)

       Population grows and the roads get congested, using the rubber tyre systems.

Surface ground transport technologies available are rubber tyre based and steel wheel on rail guided system with the latest addition of uneconomic magnetic levitated system. Unguided rubber tyre systems have limited loading density, low average speeds and get saturated very early as compared to steel railway, which is guided and can be automated, providing scalable mass rapid capacity ; but lacks the flexibility of point to point service of rubber tyre road transport, destroys built up areas if a railway has to be constructed, cannot follow existing roads. Rubber tyre systems as feeders to railway cause inter-modal transfer congestion problems.  Mumbai suffers these ills.

An elevated railway, along and over the busy roads, introduces the additional risk of a train jumping tracks with disastrous consequences.

The Sky-wheels, a break through solution, presented by Mr Rajaram in 1989 in Italy, makes it impossible for the running wheels and bogie escape the railway tracks, enclosing in a concrete box, while retaining all the properties of the proven railway.


 Experiments on test track at Goa including a freak accident while conducting an experiment prior to certification, followed by safety trials and certification post-accident, conclusively proved that Sky-wheels based system is safer than railway.

 Almost all the serious short comings of railway got removed- a turning radius of 20m and capability of vertical lifting, makes the Skybus standard gauge metro rail capable to follow existing narrow roads. The design loads are better defined with more pay load; Skybus train lengths of 60m long carries 1200 passengers, with easy access from footpaths. Actual cost of Rs 35 cr per km for including Sky-station, two rolling stock units and all electricals and control gear (Yr.2004 prices) establishes that commercial Skybus can be delivered at Rs 50 to 60 cr per km without any doubt even now. Grid of Skybus routes on Mumbai routes eliminates inter-modal transfer congestions and a net work of 100 km costs only Rs 6500 cr to provide 6 million passenger journeys a day in peak times, at 50% capacity utilization, multiple point to point service, safety certified by internationally renowned accredited agency to the best international norms. That is the benefit of improved financially viable railway technology which any city like Mumbai or Kolakata or Bangalore can avail!

M/S Atri Knowledge Embedded Infrastructure Lab.(P) Ltd., supported by TUV Rheinland Group Germany, world renowned safety assessors, led by Mr B. Rajaram with unique experience of having delivered the country’s first BOT project the Konkan Railway ( 1990-2005), proven experience of delivering to the country world’s first & unique anti-collision technology for railways and the Skybus railway for metros, will undertake for any willing state to form an SPV with a willing private BOT infrastructure company, providing a stake for a state infrastructure company and deliver the metro rail at no cost to the State Government, within two to three years, if they issue a letter of intend to the M/S Atri KEI Lab.(P) Ltd., Hyderabad.

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