The following are the basic requirements of good alignment for railway track between two terminal stations:
1. The alignment should be straight and short so as to provide economy in the cost of construction, maintenance and transportation.
2. The alignment should be easy for construction, maintenance and traffic operations, when there is minimum gradient and flat curves.
3. The alignment should be safe for traffic operations.
4. The alignment should be economical when it have less cutting and filling and it should have less number of cross drainage works such as bridges and culverts etc.
5. The alignment should be of maximum utility.
6. The alignment should have a good natural aspect when it will pass through regions of natural beauty and scenery.
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