Research Projects

We are currently involved in diverse research projects on infrastructure asset management, both nationally and internationally.

Current research projects


The PMS is one of the most important bases for estimating the financial requirements for maintenance of the federal trunk road network. With the development of the guidelines for assessing the structural substance of the superstructure of asphalt pavements (RSO Asphalt, new basis has been created, which represents a significant improvement in the assessment for assessing the remaining potential of the structural substance of asphalt base courses.

The aim of this research project is to create a significantly improved basis for predicting maintenance requirements within the framework of the PMS by detailing the material data basis and improving the calculation method for predicting the service life of asphalt base layers.

The project is being carried out under the direction of the Steinbeis Transferzentrum for Infrastructure Management in Transportation and in cooperation with the TU Dresden.


The key future tasks of infrastructure managers will be the systematic modernisation of existing structures, including during operation. Efficient life cycle management (LCA) of infrastructure structures should help to increase the service life of the structures and minimise the necessary interventions in traffic.

The aim of the research project is to further develop the concept of life cycle management and apply it on a pilot basis. To this end, a list of indicators for the assessment of the life cycle phases, planning, construction and dismantling is to be expanded. The specific requirements of the different modes of transport (road, rail, water) are to be taken into account in the development of the demonstrator.


The GreenInfraTwins project is investigating the use of digital twins to assess and communicate the sustainability of infrastructure structures.

The introduction of BIM has already initiated the lifecycle-accompanying collection of data for sustainability analyses from planning, construction and monitoring. However, the further evaluation and utilisation of this data for circular resource management still requires further development. We are very pleased to be able to deal with these tasks as part of the new GreenInfraTwins research project, funded by the Federal Ministry for Digital and Transport (DE), the Federal Ministry for Climate Protection, Environment, Energy, Mobility, Innovation (AT) & Technology and the Federal Roads Office ASTRA (CH), as well as the Austrian Research Promotion Agency (FFG), as part of the DACH transport infrastructure research programme. In addition to the description of the construction of digital twins, we will also demonstrate them on real infrastructure structures and show how they can be used in the utilisation and disposal phase. The consortium partners met for an initial workshop in Essen at the end of January. The aim was to jointly define relevant use cases for the sustainability assessment of infrastructures. The focus of the research project is on the development of sustainability-related use cases for a digital twin in the operational phase.

Further development of the condition assessment methodology for rural roads

The aim of the project, which was commissioned by the Federal Highway Research Institute (BASt), is to develop a methodology and to test it within the framework of exemplary initial applications in a delimited urban area, which enables an improved description of the road condition. The existing condition indicators will be reviewed and expanded in order to ensure an improved condition description in the municipal area with regard to economic value retention, serviceability and road safety. Further sub-objectives are being worked on: Development of assessment methods and revision of merging algorithms, testing of the new methodology as well as statistical evaluation and comparison of the recording results, debate on the further use of the research results.

VSS analysis project visZEB (visual condition assessment and evaluation in Switzerland

The data from the condition survey of the road surface form the basis for strategic maintenance planning. In Switzerland, surface damage, among other things, is surveyed for this purpose, as defined in VSS 40925 including the appendix. In practice, however, there are increasing problems in handling the described procedure of visual survey and assessment. On the one hand, the existing damage catalog with its defined damage patterns is too detailed and different damage characteristics are difficult to distinguish from each other. On the other hand, additional assessment possibilities arise due to new methods of recording and evaluating the condition data. The aim of this analysis project is to improve the evaluation methodology for pavement surface damage based on the damage catalog with special consideration of new collection and evaluation procedures.

Determination of the financial requirements of road maintenance in municipalities, with regard to the life cycle and maintenance strategies, as well as the development of a control-relevant key performance indicator (KPI) system

For municipalities, road infrastructure is a significant fixed asset. Determining the financial requirements for maintaining these assets is much more complex than in the interurban road network, where maintenance management focuses on main roads. Municipalities also have to maintain access roads, take into account excavations for supply and disposal lines and divide the very limited area between the different types of use.

The aim of the research project is to develop a methodology and to test it within the framework of exemplary initial applications in the municipalities, which will make it possible to determine the financial requirements of road maintenance in the municipalities. For this purpose, a control-relevant key figure system is to be developed, in which both the life cycles of the infrastructure elements and the maintenance strategies to be selected are mapped from both a technical and an economic point of view.

More info can be found here:

Estimation of the remaining service life of bridge structures by developing and testing hybrid models

Forecasts of the remaining service life of bridges and their components are essential for optimising maintenance strategies.

In this project, a hybrid approach is used to make existing information from condition databases usable for forecasts, to integrate physical damage models and to incorporate comprehensive expert knowledge. The merging of the different approaches is carried out via statistical procedures, whereby the quality underlying the respective prognosis is taken into account.

Use of asphalt reinforcement for the maintenance of roads

Asphalt reinforcements are partly used in the road surface for maintenance measures. The aim of this research project is to evaluate the potential of asphalt reinforcements for use in road maintenance and to create the necessary methodological basis for consideration in the planning processes. This will ensure optimal use in road maintenance. The grids commonly used in Switzerland are considered. The aim is to propose a design methodology for asphalt construction with grids and to define the design rules (best practice) in terms of practical aspects relating to the assessment of properties, installation, inspection and performance evaluation. Necessary adaptations in the national standards (e.g. SN 640 324 and SN 640 733) will be identified.


Workers on road construction sites are exposed to a variety of potential hazards and immissions from existing traffic and the construction machinery in use.

The mission of InfraROB is to reduce workers’ exposure to traffic as well as construction machines, reduce the cost of repetitive tasks, and increase the safety of road users, while increasing the availability of the transport network. To this end, the project promotes significant advances in automating, robotising and modularizing the construction, upgrade and maintenance of the road infrastructure on roadbed and pavement.


Our president Rade Hajdin partook in the COST action TU1406 on quality specifications for roadway bridges. Based on that cooperation the group Eurostruct was formed. Read more about the European association on quality control of bridges and structures here:

Completed research projects

Development of methods for the (partially) automated creation of BIM models for existing road bridges

Within the scope of the project, a concept for the (partially) automated creation of BIM models based on existing data as well as point clouds of existing bridges of the German trunk road network obtained with modern surveying techniques is to be developed. This is intended to significantly reduce the effort required to create such models and to create the basis for a comprehensive coverage of BIM models in the entire federal trunk road network. The concept is to be implemented in a prototype and tested on practical examples.

Maintenance management of tunnels - development of a decision model

In the project EP4, a broad-based solution approach with combined decision-making is pursued. The different damage processes (actionable and non-actionable) are analysed with regard to their current and future damage potential. For actionable damage processes, best practices in decision making, taking into account uncertainties, are used to identify long-term options for action and their costs. For non-traceable, hidden damage processes – any failure caused by them thus occurs unexpectedly – risk considerations are used in the decision model. This approach can also be further generalised to sudden events, such as natural hazards. In particular, the proposed approach supports the so-called “what-if” analysis, which is particularly useful when the overriding interests have to be taken into account.

Maintenance management of tunnels - development of a COST model

For the road operator, cost estimation is one of the essential decision elements of maintenance planning. Essentially, a cost model should be developed that can be used in the context of maintenance planning. The costs should be structured to such an extent that a comparison between the costs of the same or similar construction elements or groups of construction elements is feasible. The level of detail should not be too low and the cost units should be applicable for compact elements (building element). The cost model will define the cost parameters for typified maintenance measures on object or building elements and make them available for use in the decision model. During the development, a cross-comparison will also be made with the existing cost structures for engineering structures, track and electromechanical installations.

Potential investigation of point clouds for engineering geodetic purposes

Procedures for the generation and evaluation of point clouds for engineering geodetic purposes are playing an increasingly important role, for example for the creation and use of digital twins, inventory, monitoring of buildings and construction progress as well as for defect detection.

The project includes a documentation of the measurement systems available on the market, a comparison of effort and benefit as well as recommendations for the comprehensive application of the systems for various work processes and areas in the context of roads. The potential of repeated measurements over the entire life cycle of planning, construction, operation, monitoring, maintenance and deconstruction will also be evaluated.


Development of a safety framework to ensure high safety performance while allowing longer life-cycles for critical infrastructure across the road, rail and inland waterway modes.


SAFEWAY’s main aim is to design, validate and implement holistic methods, strategies, tools and technical interventions to significantly increase the resilience of inland transport infrastructure by reducing risk vulnerability and strengthening network systems to extreme events.


The goal of the research project was to analyse and compare probabilistic approaches with the aim of implementation in Pavement Management Systems (PMS). In parallel, the quality of the existing data to be integrated into a probabilistic prediction model was assessed.


The AMSfree project analyses the architecture of Infrastructure Asset Management Systems (IAMSs) used by National Road Authorities (NRAs), as well as the asset information content in current IAMSs in order to establish detailed technical requirements for linking IAMS and Building Information Models (BIMs) as infrastructure asset databases on a macro and micro level.


Over road structures’ lifetime, their relevant material properties will be documented and defined within a thorough and consistent BIM-framework with the asset management of roads in mind. The framework will be connected with currently in place asset management data solutions.


The development of the condition of roadways is determined, among other things, by the construction materials used and their technical properties. The aim of the mapFALKE research project was the further development of forecast models for improved estimation of long-term costs in maintenance planning. This was achieved through the integration of construction material data and the use of expandable calibration methods in the models for condition forecast.

Reliability-Based Structural Monitoring​

A concept and technical solution for reliability-based inspections was developed and implemented in a prototype. Bayesian networks, in which all input parameters and their distribution functions are taken into account, were defined for estimating the reliability index.

Development of a tool for indicator-based, cross-modal life cycle management of structures

The aim of the project is to design an indicator-based tool on the basis of an international literature study, on the basis of expert surveys in the context of workshops and on the basis of the existing data bases of the three modes of transport, which can be used for a future life cycle management of infrastructure structures. In particular, the current developments with regard to new forms of data acquisition and processing in the condition assessment of engineering structures using a Bayesian approach are to be taken into account. Finally, an IT prototype is to be developed on the basis of the review and evaluation of the available data bases and applied to exemplary data.

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