An access control method for granting access to a building by means of a building access control system having an access system control unit , wherein the access system control unit comprises at least one processor and at least one computer-readable storage medium storing instructions for the at least one processor , wherein the access system control unit is communicatively coupled via a network to a first door having a first door sensor , a second door having a second door sensor and a database storing access rights information for one or more users, the building having an elevator system with an elevator control unit coupled to the access system control unit . comprising: identifying a user by the access system control unit based on a credential presented by the user to an input device for the first door , the input device being coupled to the access system control unit ; granting the user access for the first door based on the credential, wherein granting the user access includes unlocking the first door in response to an unlock signal sent to the first door by the access system control unit upon verifying by the access system control unit that the user associated with information of the credential is authorized to pass through the first door ; detecting a movement at the first door by the access system control unit upon receiving a movement signal sent from the first door and generated by the first door sensor ; adaptively determining a travel time for the user between the first door and a second door ; granting the user access for the second door by the access system control unit after the travel time for the user between the first door and the second door has elapsed since the movement at the first door , access for the second door being granted by the access system control unit sending an unlock signal to the second door to unlock the second door for being opened by the user, and being granted without the user presenting the credential for the second door and receiving by the access system control unit a movement signal from the second door , the movement signal being generated by the second door sensor and confirming that the second door was opened. identifying a user by the access system control unit based on a credential presented by the user to an input device for the first door , the input device being coupled to the access system control unit ; granting the user access for the first door based on the credential, wherein granting the user access includes unlocking the first door in response to an unlock signal sent to the first door by the access system control unit upon verifying by the access system control unit that the user associated with information of the credential is authorized to pass through the first door ; detecting a movement at the first door by the access system control unit upon receiving a movement signal sent from the first door and generated by the first door sensor ; adaptively determining a travel time for the user between the first door and a second door ; granting the user access for the second door by the access system control unit after the travel time for the user between the first door and the second door has elapsed since the movement at the first door , access for the second door being granted by the access system control unit sending an unlock signal to the second door to unlock the second door for being opened by the user, and being granted without the user presenting the credential for the second door and receiving by the access system control unit a movement signal from the second door , the movement signal being generated by the second door sensor and confirming that the second door was opened. <EOS>