Future
a) What about a new unit :- Railroad Gang (Engineer + militia)?
b) What about an auto repair option for the Railroad Gang? e.g. repair all rail damage in current political state or grand region.
Current
c) Could the rail repair icon be made available full time rather than toggle with the destroy rail icon? There are occasions where a repair unit is only one days travel away from a region that needs a rail repair and could start repairs on day two and be completed by the end of the turn. Currently you have to wait until the next turn to enable the repair unit to start its work, effectively wasting the best part of a turns worth of repair time.