law: Railways Act, 1989
  19. Over-bridges and under-bridges.  
  (1) Where a railway administration has constructed lines of
  
  rails across a public road at the same level, the State Government or the local
  
  authority maintaining the road, may, at any time, in the interest of public
  
  safety, require the railway administration to take the road either under or
  
  over the railway by means of a bridge or arch with convenient ascents and
  
  descents and other convenient approaches, instead of crossing the road on the
  
  level, or to execute such other works as may, in the circumstances of the case,
  
  appear to the State Government or the local authority maintaining the road to
  
  be best adapted for removing or diminishing the danger arising from the level
  
  crossing.
  (2) The railway administration may require the State Government
  
  or the local authority, as the case may be, as a condition of executing any
  
  work under sub-section (1), to undertake to pay the whole of the cost of the
  
  work and the expense of maintaining the work, to the railway administration or
  
  such Proportion of the cost and expenses as the Central Government considers
  
  just and reasonable.
  (3) In the case of any difference of opinion between the railway
  
  administration and the State Government or the local authority, as the case may
  
  be, over any of the matters mentioned in sub-section (1), it shall be referred
  
  to the Central Government, whose decision thereon shall be final.