FEHRLopedia


The FEHRLopedia has been designed as a portal to road infrastructure knowledge.  The system links relevant content from numerous reputable sites on the internet.  Users can search for information using different selection criteria; including project type, target end user, and technical scope.  Users can also add new content and rate existing content according to the usefulness of the links.


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Objects localization in road scenes: Effects of aging and cognitive distraction     0 3568 01.04.2010
  This research aimed to study the effects of aging and cognitive distraction on the localization of objects in natural road scenes at intersection. In order to consider the role of the scene context on the subjects’ performance, a modified version of the jumble scenes paradigm was used. Intersection pictures divided into nine sections were presented in three conditions (coherent form, partly and fully jumbled). Participants had to localize one object (i.e., vehicle, pedestrian, traffic ligh ...[more]
Warm asphalt bituminous mixtures with regards to energy, emissions and performance     5 3752 31.08.2009
  With the current concerns about sustainable development and greenhouse gas emissions in various fields, the road domain has also to contribute. Indeed, asphalt mixture production is a very important energy consuming phase in order to heat the aggregates and binder, and also maintain a low viscosity for a sufficient workability and level of compaction. In order to decrease this environmental load, warm asphalt mixtures produced between 60 and 140 C have been developed. This paper presents the ma ...[more]
Structural Evaluation of flexible pavements using non destructive tests     0 3545 31.08.2009
  The aim of this paper is to contribute to the improvement of the methodologies used in structural pavement evaluation, concerning in particular the backcalculation of layer moduli based on Falling Weight Deflectometer (FWD) together with Ground Penetrating Radar (GPR) test results and using Artificial Neural Network (ANN) technique for the analysis. A brief description of the test procedures and analysis methods is made. The bearing capacity of a pavement is generally evaluated through non-destr ...[more]
Improving on flexible pavement IRI prediction by correcting for possible bias     0 3786 31.08.2009
  The smoothness prediction models (in IRI) currently incorporated into the Mechanistic-Empirical Pavement Design Guide (M-E PDG) of the United States have been developed by means of Ordinary Least Squares (OLS). However, some of the variables that are used in predicting future IRI were previously estimated by means of separate performance models, which could cause bias because of the correlation between the previously estimated distress types and the unobserved components of the IRI model. The bi ...[more]
Method to measure the quality and reliability of RDS-TMC messages     0 3583 31.08.2009
  Intelligent transportation systems have a high potential to optimise traffic flow, to increase road traffic safety and to reduce environmental pollution. Real Time Traffic Information (RTTI) systems help to achieve these targets. Beside verbal radio announcements the most used RTTI service is the Traffic Message Channel (TMC) as a part of the Radio Data System (RDS). TMC messages support drivers in their choice of efficient routes or prepare them to cope with situations on the route ahead. The m ...[more]
Dynamic traffic and safety management in Brussels     0 2853 31.08.2009
  Sustainable development is one of the major challenges of the 21st century. Faced with the growing demand for both passenger and goods mobility, present-day societies have to develop concrete solutions to control the social, economic and environmental impacts of this increasing demand. One solution lies in the dynamic real-time management of transportation flows typically generated in large urban built-up areas. It relies on the great technological progress achieved over the past decade in the ...[more]
The crucial role of regular financing of public roads: the case of Hungary     0 3286 31.08.2009
  Non-regularly and insufficiently financed road construction, maintenance and operation can cause losses for the society by extra external costs and the lack of positive influence on economic growth and for the individuals by increasing the operational costs (fuel, time, maintenance, lubricant) of the vehicle. The present study aims to show the negative effects of low and unstable road financing on the related market environment and the state’s fiscal revenues. Though we, in the first pla ...[more]
Noise Emission of typical road Surfaces within New Member States using the CPX Method and the new ASTM Tyre in the EU project SPENS     5 3433 31.08.2009
  Traffic noise is one of the major environmental concerns within the European Union. More than 80% of the traffic noise pollution is generated from road traffic. The noise emission of the most common road vehicles is nowadays dominated by tyre/road noise in the speed range above 30 km/h. In order to develop low-noise pavements test methods to quickly assess the noise emission properties of the surfaces has been standardized. The draft standard ISO/CD 11819-2 (CPX, Close-ProXimity) presents a flex ...[more]
Mineralogy, texture and mechanical properties of anti-skid and asphalt aggregates contributing to urban dust     0 3653 23.10.2009
  In northern latitudes mineral dust is formed when cars use studded tires and roads are sanded to obtain more traction on the icy road surfaces. Mineral dust originates from both asphalt and anti-skid aggregates and the dust is deposited on the ground. During late winter, especially when the surfaces of roads dry out, the dust rises into the air. Urban dust can be hazardous to health and it lowers the quality of everyday life in cities. In order to protect people from the effects of airborne pa ...[more]
Influence of Roadway Surface Discontinuities on Safety     5 3618 11.06.2010
  TRB’s Transportation Research Circular E-C134: Influence of Roadway Surface Discontinuities on Safety is designed to help highway engineers evaluate roadway maintenance guidelines and priorities. The report addresses safety issues related to roadway roughness, holes, and bumps; the positive effects of road surface discontinuities; pavement edges; friction variations; water accumulations; surface contaminants; and small and large vehicles. ...[more]
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