Abstract: It is provided a method for providing a credential set to a credential carrier for gaining access to a physical space. The method is performed in a credential provider and comprises the steps of: preloading a plurality of credential sets from a server into a local memory, each credential set being usable to gain access to a physical space and each credential set comprising a first validity time; wherein, when a network connection between the credential provider and the server is unavailable, performing the following steps: obtaining a request to provide a credential set for a physical space; retrieving a credential set from the local memory, the credential set being usable to gain access to the physical space indicated in the request; and providing, as long as the first validity time of the credential set has not expired, the retrieved credential set to a credential carrier.

Abstract: It is provided a method for providing a credential set to a credential carrier for gaining access to a physical space. The method is performed in a credential provider and comprises the steps of: preloading a plurality of credential sets from a server into a local memory, each credential set being usable to gain access to a physical space and each credential set comprising a first validity time; wherein, when a network connection between the credential provider and the server is unavailable, performing the following steps: obtaining a request to provide a credential set for a physical space; retrieving a credential set from the local memory, the credential set being usable to gain access to the physical space indicated in the request; and providing, as long as the first validity time of the credential set has not expired, the retrieved credential set to a credential carrier.

Abstract: A vehicle control system issues control signals to vehicles to control their movements along a route between a first location and a second location, the vehicles comprising a set of vehicles of a first type, to which the system can issue control signals at more than one location within the route, and a set of vehicles of a second type to which the system cannot issue control signals at more than one location within the route. Sending devices sense vehicles entering and leaving the route and the type of these vehicles, storage devices stores a record of the number of vehicles within the route and a record of the type of vehicle that most recently entered the route, signalling devices signal to vehicles whether they may enter the route by moving beyond the first location and control devices receives information from the storage devices and transmits signals to the signalling devices.