The current hanging display boards in the subway stations are ok but I think they can be improved. We can have digital billboards in surrounding places and/or in subway stations that show real time information with access to current news and real time subway information of where trains are (for example spots on the map are differently colored to show what trains are currently where instead of just an estimation of how long the train will arrive at the station.) This could also be adapted onto bus stops and placed into the waiting booth for the stops.
A second thing I think can happen is since all cars have some sort of GPS system, when a police vehicle or firetruck needs to handle an emergency, a centralized GPS system would help scatter civilian vehicles to ensure authorities get to their destination asap. The system could show the path of the firetrucks to all local drivers so the drivers will know ahead of time to create a path for the firetrucks.