An electronically controllable pneumatic brake system , comprising: at least two brake circuits (A, B, C), wherein at least one of the at least two brake circuits (A, B, C) is assigned an electrically and pneumatically controllable control valve and a further of the at least two brake circuits (A, B, C) is assigned an electrically controllable parking brake valve , for specifying brake pressures (p1, p2, p3, p4, pPB) for controlling wheel brakes of the respective brake circuit (A, B, C), a first control unit , which is configured to electrically control the respective control valve both depending on a target vehicle deceleration (zSoll) requested in automated manner, and as an alternative to this depending on an actuation (ds) specified by the driver via an actuation device , characterized in that a second control unit is configured to electrically control the parking brake valve depending on the target vehicle deceleration (zSoll) requested in automated manner when an electrical control of the respective control valve is prevented from forming an electronically-pneumatically controlled redundancy, and further at least one bypass valve assigned to a control valve is provided, which is configured to pneumatically (pA, pB) control the assigned control valve , wherein the pneumatic control (pA, pB) occurs both depending on the target vehicle deceleration (zSoll) requested in automated manner, and as an alternative to this depending on the actuation (ds) of the actuation device predefined by the driver, when an electrical control of the respective control valve is prevented from expanding the electronically-pneumatically controlled redundancy. at least two brake circuits (A, B, C), wherein at least one of the at least two brake circuits (A, B, C) is assigned an electrically and pneumatically controllable control valve and a further of the at least two brake circuits (A, B, C) is assigned an electrically controllable parking brake valve , for specifying brake pressures (p1, p2, p3, p4, pPB) for controlling wheel brakes of the respective brake circuit (A, B, C), a first control unit , which is configured to electrically control the respective control valve both depending on a target vehicle deceleration (zSoll) requested in automated manner, and as an alternative to this depending on an actuation (ds) specified by the driver via an actuation device , characterized in that a second control unit is configured to electrically control the parking brake valve depending on the target vehicle deceleration (zSoll) requested in automated manner when an electrical control of the respective control valve is prevented from forming an electronically-pneumatically controlled redundancy, and further at least one bypass valve assigned to a control valve is provided, which is configured to pneumatically (pA, pB) control the assigned control valve , wherein the pneumatic control (pA, pB) occurs both depending on the target vehicle deceleration (zSoll) requested in automated manner, and as an alternative to this depending on the actuation (ds) of the actuation device predefined by the driver, when an electrical control of the respective control valve is prevented from expanding the electronically-pneumatically controlled redundancy. <EOS>