Articles in Taxonomy

Passively safe support structures for road equipment

A little less than 40 % of all road fatalities result from collisions with roadside obstacles. Collisions with such isolated obstacles are about twice as lethal as on average and cause 1.6 times more serious injuries as on average. Natural obstacles (such as trees) are by far the largest group. Additionally, considerable numbers of lives are lost in collisions with lighting columns and other road equipment.
Collisions with lighting columns and other robust support structures account for slightly less than 10 % of the total number of road deaths. Yet for lighting columns and for sign or signal poles there are alternatives that are not inferior in functionality to conventional rigid structures. This makes a major difference for the occupants of a passenger car running into such a support structure.

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BRRC as a sectoral operator for CEN/TCs 226 Road equipment, 227 Road materials and 396 Earthworks

Le 20 mars 2007, le conseil d’administration du Bureau de Normalisation (NBN) a reconnu notre centre de recherche en tant qu’opérateur sectoriel pour les comités techniques européens CEN/TC226 Equipements de la route et CEN/TC227 Matériaux routiers.

Fin 2009, le CRR, conjointement avec le CSTC, a été accepté en tant qu’opérateur sectoriel pour le tout nouveau CEN/TC396 Terrassements.

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Measurement of the daytime visibility of road markings

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The result of this measurement, daytime visibility, is the luminous intensity from a surface unit of sampled road marking, as perceived by a motorist from a distance of 30 m; it is expressed per unit of illumination of the marking under diffuse lighting conditions. Diffuse lighting can be compared to natural lighting under a clouded sky, or street lighting at night. Daytime visibility is expressed in mcd lx-1 m-2. Typical values for the daytime visibility of new white markings range between 100 and 200 mcd lx-1 m-2. On concrete, which is lighter in colour, usually a higher initial value is required than on asphalt, since not only absolute daytime visibility is important, but also the contrast of the marking with the surrounding road surface. The measuring apparatus available at BRRC is a Qd30 instrument of the DELTA company; it is described in more detail in BRRC’s information leaflet F56.

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Field performance requirements for road markings

Il est important, durant toute la durée de vie du marquage, qu’il:
- ait la bonne couleur (blanc ou jaune en Belgique),
- soit visible en toutes circonstances,
- soit suffisamment rugueux pour éviter que l’on ne glisse sur lui (SRT).

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Item 241-01 HERMES – Harmonization of European Routine and research Measuring Equipment for Skid Resistance

HERMESHarmonization of European Routine and research Measuring Equipment for Skid Resistance was a FEHRL-funded pre-normative project that aimed to lay the foundations for consistent European standardization of skid resistance measurement on roads and runways. Underlying the work was the idea that the project should give the initial impetus to the implementation of a common scale of friction, the so-called EFI (European Friction Index), together with an associated harmonized calibration procedure, in all European countries.

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