how to represent a bridge in eagle pcb schematics?
Eagle wants you to put junction points where two lines connect each other. Otherwise gives a warning in ERC (Electrical Rule Check). I suggest you this notation;



This way Eagle becomes sure, if it's a connection or just a different net passing over. To put junction points you can use 'Junction' from toolbar. But if you draw your nets with 'Net' tool rather than 'Wire' tool junctions will be automatically put.