SAFE DISTANCE INDICATOR SYSTEM OF BRIDGE SUPERSTRUCTURE

A moved distance indicator of a superstructure of a bridge is provided to check the moved state and moved distance of the superstructure by installing a flow distance displaying unit at an upper end of the lower draining guide conduits. A moved distance indicator of a superstructure of a bridge comprises a flexible pipe(160), an indicating unit(161), and a flow distance displaying unit(16). The flexible pipe has an upper end connected with a rear end of an upper draining guide conduit(13), and a lower end connected with an upper end of a lower draining guide conduit(14). The indicating unit has an upper end fixed to an upper rear end of the flexible pipe. The flow distance displaying unit is installed at the upper end of the lower draining guide conduit. The flow distance displaying unit has a display plate(162a), a scale display part(162b), and danger displaying parts(162c).