Population growth and congestion in Chennai, India, led the local government
to expand metro rail services by two corridors totaling 45 kilometers and 36
stations. As the prime consultant on this $3.2 billion project, Delhi Metro Rail’s
services include alignment design, station layout and planning, yard layout and
design, geotechnical investigation, utility diversion plans, traffic diversion plans,
and structural design of buildings and viaducts.
The company used Bentley Rail Track to achieve optimal alignment design in
the dense urban environment. The software assisted in designing sufficient
clearances both above and below ground. In some instances, alignment was
converted from elevated to underground and vice versa. Reducing the alignment
length by 100 meters saved $5 million, and long-term benefits include reduced
traffic congestion, fuel consumption, and air pollution.
Delhi Metro Rail Corporation Ltd.
Phase 2 Line 2 (Central Secretariat—Qutab Minar)
Metro rail service has become a lifeline in Delhi, India, where a mix of bicycles,
scooters, buses, cars, and rickshaws compete for road space. Delhi Metro
Rail has developed nearly 110 kilometers of rail lines to better accommodate
commuters. At a cost of $415 million, the 11-kilometer Central Secretariat—
Qutab Minar stretch is expected to provide service in 2010.
Delhi Metro Rail designed the rail line using Bentley Rail Track, which
performed as expected and helped overcome two obstacles. First, a rare
reverse curve was successfully designed between two turnouts, and, second,
rocky soil conditions were resolved with quick and simple realignments.
Benefits to residents include safe and prompt rail travel and reduced fuel
consumption and pollution.