Electronically controllable pneumatic brake system in a vehicle, in particular a utility vehicle, at least comprising: wheel brakes (1, 2, 3, 4) for braking wheels (5, 6, 7, 8) of the vehicle, wherein wheel brakes (3, 4) of at least one vehicle axle (HA, VA) comprise spring-loaded cylinders (3a, 4a) for implementing a pneumatic parking brake in a parking brake braking circuit of the vehicle, an electronically controllable monostable bypass valve, wherein the monostable bypass valve is disposed between a manually operable parking brake valve and the spring-loaded cylinders (3a, 4a) such that the monostable bypass valve controls a bypass control pressure to implement a parking brake force, characterized in that the monostable bypass valve - in a first switching position controls the bypass control pressure depending on an actuation pressure produced by the parking brake valve to implement a manually specified parking brake force (fPBm), wherein the maximum actuation pressure corresponds to a reservoir pressure (pV) of a reservoir pressure medium in a parking brake pressure medium reservoir supplying the parking brake braking circuit, and - in a second switching position controls the bypass control pressure depending on a venting pressure (pE) prevailing in a bypass vent connection to implement an electrically specified parking brake force (fPBe), wherein a parking brake braking pressure (pPB) controlled at the spring-loaded cylinders (3a, 4a) can be set depending on the respective bypass control pressure, and wherein the monostable bypass valve automatically changes over to the first switching position without electrical actuation. wheel brakes (1, 2, 3, 4) for braking wheels (5, 6, 7, 8) of the vehicle, wherein wheel brakes (3, 4) of at least one vehicle axle (HA, VA) comprise spring-loaded cylinders (3a, 4a) for implementing a pneumatic parking brake in a parking brake braking circuit of the vehicle, an electronically controllable monostable bypass valve, wherein the monostable bypass valve is disposed between a manually operable parking brake valve and the spring-loaded cylinders (3a, 4a) such that the monostable bypass valve controls a bypass control pressure to implement a parking brake force, characterized in that the monostable bypass valve - in a first switching position controls the bypass control pressure depending on an actuation pressure produced by the parking brake valve to implement a manually specified parking brake force (fPBm), - in a first switching position controls the bypass control pressure depending on an actuation pressure produced by the parking brake valve to implement a manually specified parking brake force (fPBm), wherein the maximum actuation pressure corresponds to a reservoir pressure (pV) of a reservoir pressure medium in a parking brake pressure medium reservoir supplying the parking brake braking circuit, and - in a second switching position controls the bypass control pressure depending on a venting pressure (pE) prevailing in a bypass vent connection to implement an electrically specified parking brake force (fPBe), - in a second switching position controls the bypass control pressure depending on a venting pressure (pE) prevailing in a bypass vent connection to implement an electrically specified parking brake force (fPBe), wherein a parking brake braking pressure (pPB) controlled at the spring-loaded cylinders (3a, 4a) can be set depending on the respective bypass control pressure, and wherein the monostable bypass valve automatically changes over to the first switching position without electrical actuation.