Method for vital coupling of a route-based protection system and a block-based protection system for railway traffic on a railway track wherein the route-based protection system comprises a first interlocking which is a route capable interlocking and wherein the block-based protection system comprises a second interlocking which is a block-based interlocking, wherein the railway track comprises at least one block protected track section (TS1, TS2, TS3'), which is secured by means of the block based protection system, wherein each track section (TS1, TS2, TS1', TS2') can assume several states, the states of the block protected track sections (TS1, TS2) being represented by line block sections (10, 11, 11') comprising line block section information and wherein the railway track comprises route protected track sections (TS1', TS2'), which are secured by means of the route based protection system, the states of the route protected track sections being represented by route sections, the states of the route protected track sections (TS1', TS2') being represented by route sections comprising route section information, wherein the block protected track section (TS1, TS3') at which the protection system changes from block based protection to route based protection or vice versa, is a transition section (TS1, TS3'), that for the transition section (TS1, TS3') at least one line block section (11, 11') and at least one route section (12, 12') are provided in parallel, wherein a block adaption device provides the at least one route section (12, 12') for the transition section (TS1, TS3'), and that the block adaption device connects the block-based protection system with the route-based protection system and communicates with the route-capable interlocking and with the block-based protection system at an interface-point (S, S'), wherein the block adaption device is adapted to receive information from and transmit information to the block-based protection system and the route-based protection system and wherein the block adaption device is adapted to set the state of the route section (12, 12') of the transition section in dependence of line block section information received from the block-based protection system and to set the state of the line block section (10, 11') of the transition section (TS1, TS3') in dependence of a route request received from the route-capable interlocking in case the line block section information does not comply with the route request. a block-based protection system for railway traffic on a railway track wherein the route-based protection system comprises a first interlocking which is a route capable interlocking and wherein the block-based protection system comprises a second interlocking which is a block-based interlocking, wherein the railway track comprises at least one block protected track section (TS1, TS2, TS3'), which is secured by means of the block based protection system, wherein each track section (TS1, TS2, TS1', TS2') can assume several states, the states of the block protected track sections (TS1, TS2) being represented by line block sections (10, 11, 11') comprising line block section information and wherein the railway track comprises route protected track sections (TS1', TS2'), which are secured by means of the route based protection system, the states of the route protected track sections being represented by route sections, the states of the route protected track sections (TS1', TS2') being represented by route sections comprising route section information, wherein the block protected track section (TS1, TS3') at which the protection system changes from block based protection to route based protection or vice versa, is a transition section (TS1, TS3'), that for the transition section (TS1, TS3') at least one line block section (11, 11') and at least one route section (12, 12') are provided in parallel, wherein a block adaption device provides the at least one route section (12, 12') for the transition section (TS1, TS3'), and that the block adaption device connects the block-based protection system with the route-based protection system and communicates with the route-capable interlocking and with the block-based protection system at an interface-point (S, S'), wherein the block adaption device is adapted to receive information from and transmit information to the block-based protection system and the route-based protection system and wherein the block adaption device is adapted to set the state of the route section (12, 12') of the transition section in dependence of line block section information received from the block-based protection system and to set the state of the line block section (10, 11') of the transition section (TS1, TS3') in dependence of a route request received from the route-capable interlocking in case the line block section information does not comply with the route request.