TISA PRODUCTS

RTTI 5-Star Rating Framework

The RTTI 5-Star Rating specifications form an international quality assessment framework that establishes clear thresholds for evaluating the accuracy, completeness and timeliness of real-time traffic information made available by road operators to ITS service providers.

By aligning road operators and ITS service providers, this quality framework fosters trust, transparent cooperation, and innovation, ensuring data quality improvements directly benefit all road users.

More information & download the document

TPEG2 Set of Standards: ISO as a Quality Stamp

Since its inception in 2007, TISA has created a variety of TPEG specifications. For their standardisation, TISA works actively together with ISO TC204 in a tight process that ensures quality and harmonisation with other standards. For TPEG, the ISO-21219 series contains 20+ ISO International standards and ISO Technical Specifications (as of 2024).

Most of these ISO TPEG standards to date focus on road travel (both for public transport as private travel, including multi-model travel). As a testament to TISA’s success, TPEG is now deployed globally by many Traffic and Travel Information services and received by many millions of devices.

TPEG Specification for Emergency Alerts and Warnings (TPEG2-EAW)

Since its inception, TISA’s priority is safety of travel. One recent development is the creation of  and its testing in a field trial in Germany in collaboration with the German Federal Office for Civil Protection and Disaster Assistance. TPEG-based distribution of emergency authorities’ alerts provides information to travellers in a safe way and helps them reroute out of danger.

When navigation systems offer TPEG2-EAW services, all travellers (also non-native speakers such as visitors from abroad) can evaluate alerts for impact, stimulating those at risk to take appropriate action.

Rejuvenation of the TPEG2 Service Delivery

Recent developments in how software and related services are developed and deployed, have encouraged TISA to renovate the TPEG2 service delivery chain. This includes an update of the serialisation scheme from the former TPEG2 binary and XML formats to using Protocol Buffers (short: Protobuf) for data serialisation. The .proto files for the most commonly used TPEG2 standards will be made available under an open source licensing scheme that will lower the threshold of implementing and using TPEG2 technology and further increase the TPEG ecosystem.

TISA is further working on updating the service delivery through using request-response mechanisms such as, but not limited to, AMQP.

TPEG Evaluation Kit

For those interested in knowing more technical details about TPEG2 in a hands-on way, TISA provides an Evaluation Kit comprising an encoder-decoder pair programmed in Python-3.

It is made available under the rather permissive BSD version 3 license to facilitate easy use of the Evaluation Kit. The source code comprises the widely used Traffic Event Compact (TEC) standard in a reduced functionality to diminish complexity, as well as the new Emergency Alerts and Warnings (EAW)  standard.

For location referencing, Open LR is used. The Evaluation Kit comes with installation instructions and can be setup within minutes. Both code and some sample data are available free of charge at the TISA Gitlab repository.

TISA QBench

TISA QBench is a method that measures the quality of Traffic Flow information. It will make a comparison between the reality (“ground truth”) and what is being reported by a service provider.

The TISA QBench Task Force has created the following documents to assist the membership in calculating TISA QBench scores:

  • SP16001 – TISA QBench Calculations: describes the steps that are needed to become the TISA QBench score.
  • SP16002 – TISA QBench Guidelines outlines the purpose, limitations and expected outcomes of the Calculations. How the calculations should be performed and how the results should be interpreted.
  • SP16003 – TISA QBench Test Data Sets are added to ensure the correct implementation of the TISA QBench Calculations (including 8 sets of test data are provided in a zip file