How do metro trains work




















The maintenance is broken up into parts: the under-frame, the interiors and the roof. We also do active, preventive maintenance," says an official.

The basic check is done every day at the depot. If a problem is detected, it goes into the IBL or the workshop, depending on the snag. If the train is going into revenue service without any major maintenance being planned, it only goes through a routine cleaning.

If a thorough cleaning is scheduled —which is done every three days—then it will go through the automated washing process. The schedule is rigorous, say Delhi Metro officials. In the basic mode, safety features of the under-frame, horn, wipers, headlights and announcement systems are checked.

After every 15 days, cleaning and measurement of the roof, the under-frame and interior features is the norm. The day maintenance schedule includes cleaning, measurement, monitoring and part over-hauling.

The rest of the activities like replacement of oils are scheduled in the later maintenance. The annual schedule is the most exhaustive, as by that time, the train has travelled more than a lakh kilometres. Maintenance of the wheels and the brakes is an important part of the schedule. The train is divided into the motor car and the driving trailer, both of which form a unit. The wheels on the DT need to be changed every eight-nine months while those of the motor car last months.

Similarly, the brakes on the DT need to be changed every 45 days while those on the motor car last five months. MTR has extensive end-to-end railway expertise with more than 40 years of railway projects experience from design to planning and construction through to commissioning, maintenance and operations. Going beyond railway delivery and operation, MTR also creates and manages dynamic communities around its network through seamless integration of rail, commercial and property development.

With more than 40, dedicated staff, MTR has patronage of over On top of that, the scope of our consultancy business also covers cities across Asia, Australia and the Middle East. MTR also commenced a property project in Tianjin. Click to view larger image. Subways and light rail already produce fewer greenhouse gases per passenger mile than most cars — and should improve as more wind, solar and geothermal power plants come online.

Also, electricity as a power source is generally quite reliable, both in terms of supply and in terms of subway and light-rail performance. But it does have its weaknesses. While the third rail on subway track is installed in a protected environment inside the subway tunnel, light rail can be subject to weather. Light-rail cars are linked to the power source via catenary wires installed overhead 12 to 16 feet above ground. Catenary, for those of you who took and remember physics, is the curve assumed by a cord or chain — or even a spider web — that hangs freely between two fixed points.

But back to the weather issue. Remember the massive storm of January, that tipped a tree onto the Gold Line catenary lines in South Pasadena? The line was closed for hours while a bus bridge ferried passengers around the spot where electricity was shut down. South Pasadena is a perfect example of what happens when the power is cut off … although in that case a tree was also blocking the tracks. Blues Point temporary tunnel access site. Barangaroo Station. Martin Place Station.

Pitt Street Station. Central Station. Waterloo Station. Sydenham Station. Marrickville Station. Dulwich Hill Station. Hurlstone Park Station. Canterbury Station.

Campsie Station. Belmore Station. Lakemba Station. Wiley Park Station. Punchbowl Station. Bankstown Station.



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