block section; block (route section with no more than one train) (railway) / station block / absolute block / absolute permissive block / permissive block / automatic block / automatic colour-light block [Br.]; automatic color-light block [Am.] / moving block / fixed block / manual block / partly permissive automatic block / entry to a block section / end of a block section / entry into an occupied block section / length of a block section; block interval Bedeutung