Traction electrification depends on Traffic generating in the area and correspondingly return on investment. The guiding criteria for RE is as follows:
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Some of the identified routes due for RE are as follows:
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You can notice (serial no. 4) the second route from Ahmadabad to Delhi, which covers a large part of Rajasthan is now ready for electrification. Infact the work has started from both North of Ahamdabad and South of Delhi. A month back i saw OHE masts under erection near Gandhidham, so maybe within 2 years, the route should be ready to host electric locomotives.
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Since you mentioned, the Rajasthan route, here is what Railway thinks:
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Source : IR electrification Vision 2020 document (@elocos)
Jaipur, i believe is last big state capital, not to have electrified rail connection, but things are due for change shortly.
Madhepura factory will be manufacturing those locos. The table i've posted is already looking outdated. BHEL was supposed to supply 5000 HP (WAG 7 class) in future, but i'm getting a news that, IR is not interested in Tap changing locomotives anymore and therefore will only be procuring 3 phase IGBT locos from BHEL too. So we may get to see WAG 9 manufactured at BHEL Jhansi in coming years. A huge number of WAG 5 are slated for retirement in next 5 years and therefore we will require not only new capacity addition but also replacement for retirements.
Gujarat has several small ports and with new maritime and ports policy, government is encouraging development of smaller ports to reduce load on main ports. On western coastline of our country, you'll notice that the Konkan coast is actually walled by Western ghats and therefore moving freight to & from hinterland to Ports like Vasco-da-Gama etc requires crossing steep gradients, limiting train capacity utilization.
Gujarat maybe a small state, but its is relatively plain and has long coastline. If the ports in state are developed properly, movement of cargo from & to North will become easier as Mumbai Port (JNPT) is highly saturated, leading to longer waiting period. Here comes rail lines that join smaller ports to mainline.
Western DFC envisages several feeder lines that connect these ports to mainline and government is also asking private players to come forward for investing in these feeder lines through PPP mode. The reults have started to show
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India’s first railway-line built under PPP model inaugurated in Gujarat
Railways is finding tough to finance several of its line, but with new policy in place and more interest from private players, i'm sure railways will start winning over freight traffic in next five years.