• ATT-Alert

  • Promise

  • Interchange

  • Predict




Under the ATT (Advanced Transport Telematics)-ALERT project, over the course of three years, Castle Rock and its partners (Automobile Association, BBC, Bosch, CCETT, Ford, Philips, Rijkswaterstaat, Swedish National Road Administration, Transport Research Laboratory, and Volvo) developed a family of protocols for disseminating multi-modal traffic and travel information. Building on the RDS-TMC protocols developed in RDS-Alert and RDS-TMC, ATT-ALERT further addressed communications bearers and applications.

Led by Castle Rock, ATT-ALERT developed a suite of traveler information system protocols that provided solutions to problems facing travelers. This work included developing an International Traveler Information Interchange Standard (ITIS), protocols for identifying how existing messaging protocols could be mapped onto particular bearers, and an expansion into more areas including route guidance, parking, and transit information.


Under the PROMISE (PROmetheus CED 10 Portable Information Systems in Europe) project, Castle Rock conceived of an—at the time futuristic—fully portable, multi-modal, traveller information system for the European audience. This system described a wide range of traveller and public information services, including traffic information and hazard warnings; public transport information; parking space availability and reservations; and tourist and visitor information. The consortium included Nigel Wall of British Telecommunications, Chalmers Univeristy, Volvo, IBM Deutschland, Nokia, PSION, Rijkswaterstaat, SNRA, and Teli.


In 1992, as affordable mobile and fixed communications technologies became increasingly available to members of the public, the demand for real-time, accurate information on a wide variety of subjects and interests increased exponentially. In the transportation sector, such information demand growth was seen in conjunction with a fundamental need for changes in the methods of disseminating traffic and travel information to travellers.

By addressing the key issues of consistent application of a data exchange standard throughout Europe, Castle Rock, working with KLPD (Dutch Police), Danish Road Institute, Danish Road Directorate, Telesia SpA, AA Developments Ltd, Swedish National Road Administration, and CETE-Mediterranee, helped to establish an INTERCHANGE pilot network, the European Traveller Information Network (ET-NET), and developed several approaches towards the real-time electronic data exchange of traffic and travel information between traffic information centers across Europe.


In 1992, Castle Rock was the leader of the PREDICT (Pollution Reduction by Information and Control Techniques) project, working in conjunction with the Organization of Athens, Costas Abacoumkin and Associates, Epsilon International, and Intracom. PREDICT developed schemes for reducing environmental pollution in Central Business Districts through use of RTI-based traffic operation and control measures, appraising the implications of vehicle technologies for potential future air quality standards in an RTI-based transport environment. PREDICT also worked to set appropriate standards for the monitoring and prediction of pollution levels and coordination with existing CEC and individual EC nation efforts.


The objective of this project was to delineate techniques for the application of artificial intelligence to traffic control problems through the development of the CLAIRE expert system. The main goals were the development and testing of prototype knowledge based systems (KBS) to solve congestion problems, development of appropriate interfaces between the KBS in improving traffic flow, and assessment of effectiveness of KBS in improving traffic flow through simulation exercises. The consortium included Castle Rock, INRETS, CR2A, the University of Leeds, the University of Nottingham, Control Trafico, and the Universitat Politecnica de Catalunya.


A solution for the congestion problems on Europe’s main corridors is the application of Integrated Traffic Management at the level of the road network. Real-time information about traffic conditions allows travellers to make optimal choices for their journey. It also allows network operators to influence traffic flows, resulting in an optimal spread of transport demand over available road capacity. The main objective of the GERDIEN project was to further develop, demonstrate, and evaluate a coherent framework for road traffic data collection and exchange. Using a set of open architectures, the framework of the project allowed modular applications to be integrated at all levels. A second objective was to implement part of the framework in a real world environment from an architectural point of view. In GERDIEN, Castle Rock worked with TNO-TPD, Rijkswaterstaat-MD, TECHNOLUTION BV, Aachen TU/COMNETS, Siemens NV, Dornier GmbH, Rijkswaterstaat-MD, TNO-INRO, ITS/Leeds, Philips BV, and AVE GmbH.


The EURONETT project was designed to assess the likely effects of enhanced information systems on travel behaviour, the transport industry, and on the long term development of cities. Empirical studies include twelve surveys and two experiments, the latter covering simulation of route guidance and RDS using a real-time computer game, and test drives in real road conditions with in-vehicle guidance and information systems. The work identifies an urgent need for both improved longitudinal data on travellers’ behavioural responses and a renewed effort in the development of experimental procedures designed to test specific hypotheses concerning behavioural response. Castle Rock worked with the University of Oxford, the National Technical University of Athens, Conlogic, and the University of Berlin on this project.



As CEO and President, Peter Davies and Kristin Virshbo serve as the lead system architects and designers for all Castle Rock software, directing a team of talented and experienced software engineers and project managers who oversee the day-to-day details of our projects.

In all of our work, we integrate both the precision and expert understanding of the traffic engineer/planner, and the careful, usability- and aesthetics-focused eye of the graphic designer. We believe that both function and beauty are the keys to successful, effective 511 systems.

511 Hosting

As technology grows and evolves so too does the CARS Group hosting platform. Over the years we have remained dedicated to the principle of providing our customers with one of the most fault-tolerant, available and elastically expandable hosting platform in the industry. This dedication has led to what we have today; a highly available, dynamically scalable hybrid network running in both private and public cloud-based data centers.

Our 511 web and phone systems are specifically designed to handle the sudden, dramatic increases in demand which occur when regional weather events hit. Our systems have successfully handled traffic spikes due to hurricanes in Louisiana, bridge collapses in Minnesota, and winter storms and flash floods in Iowa. Our years of hard-won experience in insuring websites and phone systems are available when they are in the most demand are evident the responsivness of our services even when under severe traffic load.

24/7 Ops & Support

A cornerstone of Castle Rock is our dedication to providing exceptional service and technical support to our clients. In the event of an emergency, clients can reach a live answering service 24 hours a day, 7 days a week, 365 days a year, and have their call returned by a Castle Rock staff member within minutes.

Castle Rock also employs an extensive monitoring system that allows our Operations staff to view trends and detect outages as early as possible. Upon detecting system behavior outside of preset parameters, these systems automatically email and page Operations staff, who are able to proactively resolve issues before clients are affected.

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