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Παρασκευή, 15 Δεκεμβρίου 2017

Παρουσίαση (στην Αγγλική) στο Διεθνές Συνέδριο "Current Advances in Road Infrastructure Safety Equipment", το οποίο πραγματοποιήθηκε στην Αθήνα, 12 – 13 Φεβρουαρίου 2015, υπό την αιγίδα του ΥΠΟΜΕΔΙ με διοργανωτές την ERF (European Union Road Federation), το ΕΜΠ και τον Σύνδεσμο Ελλήνων Συγκοινωνιολόγων (ΣΕΣ).

EN 1317 and its Implementation in Greece Despina Drymalitou Member of WG1 and TG2/TC 226/CEN Transportation and Infrastructure Dipl. Engineer12-13 February 2015 | Athens, Greece Overview: • • • • • • • • •Introduction Implementation of EN 1317 What ACHIEVED Usual problems FAQ in Greece for the implementation of EN 1317 Answers to FAQ Benefits by following the above process Summary Conclusions12-13 February 2015 | Athens, Greece Introduction: • The implementation of EN 1317 is mandatory • All installed RRS must be CE marked (if appropriate CE marking available) • CE marking allows products to be placed on the market • Important to understand – EN 1317 restricted to determining product performance 12-13 February 2015 | Athens, Greece What does it mean? • EN 1317 does not include any reference to Design, Installation and Maintenance • EU member states maintain responsibility for road safety and so need additional national guidelines (as long as these do not contradict EN 1317) 12-13 February 2015 | Athens, Greece Implementation of EN 1317 in Greece: Before the end of co-existence period (31.12.2010) the Greek State has proceeded with National Guidelines for the installation of RRS in order to be defined the performance of products placed on the roads. The preparation of harmonized National Guidelines for Road Restraint Systems and its necessary adoption to the increased safety requirements on roads is an important step for the implementation of EN 1317. 12-13 February 2015 | Athens, Greece Greek National Guidelines for RRS installation, define: • the roadside hazards • the logical minimum protection level for roadside hazards • a reliable tool to take effective and sustainable decisions regarding minimum system performance against determined roadside hazards • the lengths before and after the obstacle 12-13 February 2015 | Athens, Greece Flowchartfor the definition of barriers' performance at the outer edge of roads, an important decision tool…12-13 February 2015 | Athens, Greece what ACHIEVED: • rules assure Road Safety • troubleshooting during the drafting of the tender specifications of stakeholders, e.g.  Authorities,  Consulting Firms,  Designers,  Contractors  etc. 12-13 February 2015 | Athens, Greece Usual problems:  Roadside configurations on roads they are not suitable to barriers test conditions, such as: • Safety barrier on bridges12-13 February 2015 | Athens, Greece Questions  Barriers of first row are piled in?  What there is underneath?  Does Product Manual cover these installation conditions?12-13 February 2015 | Athens, Greece • Safety barrier on asphalt pavement• Drainage ditches close to pavement edge line 12-13 February 2015 | Athens, Greece • Transitions from one to another barrier• End terminal12-13 February 2015 | Athens, Greece • Central reserve openingsHow effective are the existing barriers?12-13 February 2015 | Athens, Greece • Terminals • Distance of obstacle from the road edge line12-13 February 2015 | Athens, Greece Other usual problems:  Soil categories  Selection criteria of barriers between numerous CE marked products are placed on market  The large number of existing road sections with roadside configurations they do not meet the modern principals and requirements for road safety 12-13 February 2015 | Athens, Greece FAQ in Greece for the implementation of EN 1317: • How can be faced all these cases that are usual in Greek roads in terms of road safety? • Are all CE marked products suitable for these particular installation cases? • Is there any contradiction between Guidelines for Road Design and EN 1317 as well as harmonized Guidelines for Road Restraint Systems? • Which can be the selection criteria of products? 12-13 February 2015 | Athens, Greece and finally: • Is it possible the implementation of EN 1317 in Greece and especially in existing road sections? • Is it possible to ask for an exception of the guideline and the EN 1317? • Do we need exception rules? • The cost of RRS is prohibitive high? 12-13 February 2015 | Athens, Greece Answers to FAQ: • YES, there are solutions and the implementation of EN 1317 in Greece is possible! • The cost of the certified products is not prohibitive In case of motorway is approximately 35.000 €/km according to indicative prices This amount includes the cost of all types of restraint systems, i.e. safety barriers, transitions, terminals, RBS and crash cushions 12-13 February 2015 | Athens, Greece • Since the implementation of EN 1317 is possible in existing road sections it’s also possible for new projects • From my experience with big projects concern existing road sections I would say that in order to face successfully all the above issues we need to proceed with the following steps:12-13 February 2015 | Athens, Greece Step 1: Proper implementation of the National Installation Guidelines for the definition of barriers performance and installation lengths.12-13 February 2015 | Athens, Greece Step 2:Data collection on current conditions of existing road sections where road restraint systems are to be installed, such as  Verge width  Drainage ditches close to pavement edge line  Distance of obstacle from the road edge line  Plinth height on bridges  Installation on asphalt pavement  etc Note: The particularity of existing roads is that we don't know the exact current installation conditions while in roads under design preparation, we define the installation conditions. 12-13 February 2015 | Athens, Greece Step 3: Evaluation and selection of restraint systems, which should be based on their total performance i.e. containment level, impact severity level, and deformation class. But in addition the following parameters – factors shall be considered:12-13 February 2015 | Athens, Greece • Modularity Modular systems consist of the same main components and have the same working mechanism during impact• Systems test length (L1) Increased length results in longer applications and thus cost of Installation and maintenance cost per running meter• Systems weight per running meter Increased weight results in increased costs• Compatibility with existing CE certified systems 12-13 February 2015 | Athens, Greece • Impact loads transferred to the bridge deck by restraint systems and measured during impact test (EN 1317-2) • Detailed installation manuals Installation conditions should covered by installation manual • Existence of transitions and terminals (tested if possible) • Whether systems are new generation systems New generation systems combine high performance and excellent impact characteristics • Existence more than one producers for each module of barriers 12-13 February 2015 | Athens, Greece Benefits by following the above process: • Same components for all barrier configurations • Easy assembly • Easy replacement, warehousing and handling • Limited number of spare parts  easy maintenance logistics • No dangerous spots due to homogeneity of connections • Minimized number of transitions • Homogeneity on road sections  simple maintenance • Minimized maintenance cost 12-13 February 2015 | Athens, Greece Summary:• The Harmonization of National Guidelines for Safety Systems to EN 1317 is an important step to improve safety level on roads within EU-Territories and the decrease of the number of fatal accidents • it is obvious that there is an understanding problem but it is not right  to require systems according to the Norm but without changing the cross-section of existing roads and/or  to ask for an exemption of the guideline, just because it is the easiest way 12-13 February 2015 | Athens, Greece • We have to face the problems and to look for the barriers which solve this problem due to their specific crash-test. • CE marking does not guarantee suitability of products for all installation conditions. Therefore in special cases the system must be tested under the installation conditions in order to assure that its performance is not changed and Installation manual should updated after the verification of NB that system covers the use conditions 12-13 February 2015 | Athens, Greece Conclusions:in consequence of the before described it should be necessary for the implementation of EN 1317 • EU-data base with all CE marked products with  their technical characteristics, e.g. components cross section, material etc.systemsheight, installation manual  CE certificates• EU-basic Guidelines for the Roadside configurations 12-13 February 2015 | Athens, Greece Thanks for the attention!12-13 February 2015 | Athens, Greece
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