1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15518-2:2011Winter maintenanceequipment Road weatherinformation systemsPart 2: Road weather Recommendedobservation and forecastBS EN 15518-2:2011 BRITISH STANDARDNational f
2、orewordThis British Standard is the UK implementation of EN 15518-2:2011.The UK participation in its preparation was entrusted to TechnicalCommittee B/513, Construction equipment and plant and site safety.A list of organizations represented on this committee can beobtained on request to its secretar
3、y.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 65402 2ICS 07.060; 13.030.40; 35.240.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Stand
4、ard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedBS EN 15518-2:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15518-2 February 2011 ICS 07.060; 13.030.40; 35.240.99 English Version Wint
5、er maintenance equipment - Road weather information systems - Part 2: Road weather - Recommended observation and forecast Matriels de viabilit hivernale - Systmes dinformation mtorologique routire - Partie 2: Mtorologie routire - Observations et prvisions recommandes Winterdienstausrstung - Straenzu
6、stands- und Wetterinformationssysteme - Teil 2: Straenwetter - Empfohlene Beobachtung und Vorhersage This European Standard was approved by CEN on 1 January 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standar
7、d the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English,
8、French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulga
9、ria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR
10、STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15518-2:2011: EBS EN 15518-2:2011EN 15518-2:201
11、1 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Requirements on the content of road weather observation and forecast products 5Bibliography 8Tables Table 1 Weather forecast products . 6BS EN 15518-2:2011EN 15518-2:2011 (E) 3 Foreword This document (EN 15518-2:2011)
12、has been prepared by Technical Committee CEN/TC 337 “Winter maintenance and road service area maintenance equipment”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at t
13、he latest by August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or
14、all such patent rights. EN 15518, Winter maintenance equipment Road weather information systems, comprises of the following parts: Part 1: Global definitions and components Part 2: Road weather Recommended observation and forecast Part 3: Requirements on measured values of stationary equipments Acco
15、rding to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, It
16、aly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15518-2:2011EN 15518-2:2011 (E) 4 Introduction Road Weather Information Systems (RWIS) are complex structures used for road maintena
17、nce decision support, which feature as a rule the following components: meteorological sensors and instruments, transmission technology, computer systems for processing, representation and storing of information, road weather forecasts and alarms, in relation to traffic control and traffic informati
18、on systems and more. Road weather observation and forecast are a set of road and atmospheric parameters and data used by the road maintenance services to determine future road conditions. This part of EN 15518 lays down the requirements for the recommended road weather observation and forecast infor
19、mation of a RWIS. The aim is to ensure extensive combination and interchangeability within the systems. BS EN 15518-2:2011EN 15518-2:2011 (E) 5 1 Scope This European Standard specifies the frequency, resolution and content of road weather observation and forecast products for a Road Weather Informat
20、ion Systems (RWIS). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Not ap
21、plicable. 3 Requirements on the content of road weather observation and forecast products Road weather is characterized by weather phenomena and meteorological parameters which affect the road surface conditions. A distinction has to be made between observation and forecast. The RWIS-forecasts shall
22、 provide the necessary information for maintenance agents to: make a short-term (up to 4 h) and a long-term (up to one week) planning for the disposition of personnel and means; decide on immediate interventions. It has to be considered that the geographical accuracy is indirectly proportional to th
23、e forecast period. Therefore a forecast for seven days covers a larger area than a short-term forecast for the next few hours. Road weather observation and forecasts describe conditions which would occur without winter maintenance interventions. They do not take into account the influences from traf
24、fic. The forecast provider discloses the scientific basis, the accuracy and the database of the products to the customer. The forecast products which are recommended are shown in Table 1. BS EN 15518-2:2011EN 15518-2:2011 (E) 6 Table 1 Weather forecast products Forecast product Frequency Resolution
25、Content long-term forecast from the 4thup to the 7thday once a day without amendment days; regions of about 100 km 100 km. general weather conditions for daytime and night-time medium-term forecast up to the 3rdday twice a day days; regions of about 100 km 100 km. a) general weather conditions for d
26、aytime and night-time; b) details of road weather parameters such as: 1) general synopsis with time; 2) minimum air temperature; 3) minimum pavement surface temperature; 4) time of zero crossing; 5) likelihood and time of precipitation or deposition on road surface; 6) wind direction and speed; 7) g
27、usts of wind; 8) snow drift; 9) probability of occurrence. short-term-forecast for 24 h in tabular form twice a day, if necessary with amendment a in 3 h to 4 h intervals; for small areas with similar climatological properties; for each 200 m to 400 m altitude-levels. air temperature; pavement tempe
28、rature; total cloud cover; precipitation; wind direction and speed; road surface conditions for different site characteristics in the region (motorways, low traffic roads, bridges, shadowy stretches, cities). Radar images and extrapolations for the next 2 h every 5 min to 15 min charts, one pixel fo
29、r max 2 km 2 km area real time images of the last 2 h; two-hour extrapolation of the actual precipitation areas; distinction between liquid and solid precipitation. BS EN 15518-2:2011EN 15518-2:2011 (E) 7 Table 1 (continued) Forecast product Frequency Resolution Content warnings as soon as possible
30、before the event area will depend on event description of events affecting road weather conditions (freezing rain) (large snow/rain falls) (high wind speeds) affected area and anticipated duration consultation with forecast provider on demand on demand on demand satellite pictures bat least 30 min d
31、epending on satellite location visible and infrared picture aThe 24-h-forecast shall be amended if significant new developments occur in the following parameters: precipitation; frost yes/no; road slipperiness; time shift of more than 3 h; fresh snow more than 5 cm. bSatellite pictures are not part
32、of the weather forecast tools, but can be used as a complementary information.BS EN 15518-2:2011EN 15518-2:2011 (E) 8 Bibliography EN 15144, Winter maintenance equipment Terminology Terms for winter maintenance This page deliberately left blankBSI is the independent national body responsible for pre
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