Embodiments include a mobile terminal and an intelligent transportation system (ITS) application client associated with a vehicle. The mobile terminal establishes a first communication link between the mobile terminal and the ITS application client. The mobile terminal also establishes a second communication link, via an infrastructure-based wireless communication network, between the mobile terminal and an ITS application server. Having established these links, the mobile terminal relays one or more event notification messages between the ITS application client and the ITS application server via the first and second links. These one or more messages each indicate the occurrence of an event pertinent to travel conditions. Relaying of messages by the mobile terminal in this way advantageously allows the ITS application client associated with the vehicle to send messages to and/or receive messages from the ITS application server, even if the vehicle itself is not configured to connect to the infrastructure-based network.