Two will carry trains - one for eastbound traffic, the other westbound.
It no longer carries trains, and is now used as a recreational feature for the general public.
This was in turn replaced by a third structure further south again, which carries trains at the present day.
Some train ferries were built to also carry cars or passengers, in addition to trains.
It has not carried trains since the division of Korea.
Some freight carrying trains are travelling on this line now.
It will be a long time before those rails carry trains again.
The bridge was built to carry trains, horses, wagons and pedestrians.
During the wars the north line was busy with troop carrying trains which commenced from here.
It carries trains over the river to Cannon Street station on the north bank.