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The Safe Tunnel project was conceived to contribute to the reduction of the overall number of accidents and incidents inside road tunnels through the introduction of a set of preventive safety measures made possible by the integration of on-board vehicle devices and ITS infrastructures using the public wireless network as a communication link.
To implement the four applications (prognosis, access and vehicle control, telecontrol and distribution of emergency messages) the project operated at different levels: vehicle, infrastructure, communication network.
The project started with the user analysis and passed through the different steps of specification, design and implementation as a continuous up to the validation/evaluation phase. In order to improve project efficiency there was some overlap among different phases and specific functionality were implemented and tested as soon as specifications and prototypes were ready, using an incremental process that allowed to recover misalignment among partners and gradually create the total system. Many feedbacks from testing phases were also taken into account at specification and implementation level.
Four applications were developed:
- Prognostic (improvement of current vehicle diagnosis introducing the capability to forecast faults).
- Access and vehicle control (communication of vehicle diagnostic data in case of anomalies to a control centre through a GSM/GPRS link . The control centre may inhibit the access to the risky vehicle or in any case suggest the best action to the driver).
- Telecontrol of vehicle speed and distance (communication of recommended speed and safety from the control centre to the vehicle through a GSM/GPRS link and on-board actuation of the received commands. As alternative to cover the unequipped vehicles the feasibility of the Moving spot light system has been performed).
- Distribution of emergency messages to the driver (use of the communication link and an HMI to distribute emergency messages to the driver in order to obtain a safer operation and more easily control the traffic flow in case of emergency).
Further improvement of algorithms and protocols, larger trial organisation and promotion of a standardization committee linked and operating with International standard organisations covered the different aspects of the system. This activity also examined the commonality with other currently developed or new coming applications using the same vehicle-infrastructure cooperation approach.
Although the system may be introduced with bottom-up approach on a voluntary basis acting on the need of safety of road users through a correct explanation of the advantages of the system the real boost can be obtained through the set-up of a common European directive linked to electronic fee collection and e-call or other e-safety initiatives.
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