BS-8408-2005.pdf
《BS-8408-2005.pdf》由会员分享,可在线阅读,更多相关《BS-8408-2005.pdf(78页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 8408:2005 Incorporating Corrigendum No. 1 Road traffic signs Testing and performance of microprismatic retroreflective sheeting materials Specification ICS 93.080.30 ? Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:23:50 GMT+00:00 2006, U
2、ncontrolled Copy, (c) BSI BS 8408:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 25 May 2005 BSI 28 July 2005 The following BSI references relate to the work on this standard: Committee reference B/509 Draft for Development 01/107289 DC
3、 ISBN 0 580 45924 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/509, Road equipment, to Subcommittee B/509/3, Construction of road traffic signs, upon which the following bodies were represented: Aluminium Federatio
4、n Association for Road Traffic and Safety Management British Electrotechnical and Allied Manufacturers Association British Precast Concrete Federation County Surveyors Society Department for Transport Institution of Civil Engineers Institution of Lighting Engineers Local Authority Sign Manufacturers
5、 Association Retroreflective Equipment Manufacturers Association Amendments issued since publication Amd. No.DateText affected 1589928 July 2005Corrections to Figures 5B and 6B; and Tables E.18B-A1, E.18B-A2, E.18B-A3, E.19B-A1, E.19B-A2, E.19B-A3 and I.1. Licensed Copy: London South Bank University
6、, London South Bank University, Fri Dec 08 06:23:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8408:2005 BSI 25 May 2005 i Contents Page Committees responsibleInside front cover Forewordiv Introduction 1 1Scope 1 2Normative references 1 3Terms and definitions 2 4Performance requirements 4 5Test m
7、ethods 7 6Photometric rating 11 7Marking, labelling and product information 21 Annex A (informative) Examples of datum axes 22 Annex B (normative) Angles and equipment used in specifying and measuring retroreflective performance 23 Annex C (normative) Headlamp light distribution used to determine lu
8、minance index 24 Annex D (informative) Selection of observation angles 34 Annex E (informative) Example of luminance index calculations 39 Annex F (informative) Calculation of the luminance index 60 Annex G (informative) Guide to selecting entrance angularity subclasses for specifiers 62 Annex H (in
9、formative) Calculation of night-time colour contrast factor 63 Annex I (informative) Guidance for specifiers on the selection of sheeting 64 Bibliography 72 Figure 1 RA values reduced for mean of three epsilon () values 45, 0 and +45 13 Figure 2 RA values reduced to lowest value of RA at the relevan
10、t orientation angles (6s) from Figure 1 14 Figure 3 RA values converted to RL values (coefficient of reflected luminance) 15 Figure 4 RL values reduced for entrance angularity subclasses 15 Figure 5A Luminance Index A (for directional signs) calculations for V1 passenger car for one entrance angular
11、ity subclass: A1 or A2 or A3 17 Figure 5B Luminance Index B (for warning and regulatory signs) calculations for V1 passenger car for one entrance angularity subclass: A1 or A2 or A3 18 Figure 6A Luminance Index A (for directional signs) calculations for V2 large vehicle for one entrance angularity s
12、ubclass: A1 or A2 or A3 19 Figure 6B Luminance Index B (for warning and regulatory signs) calculations for V2 large vehicle for one entrance angularity subclass: A1 or A2 or A3 20 Figure 7A Luminance Index A values by subclass 20 Figure 7B Luminance Index B values by subclass 21 Figure A.1 Datum axe
13、s 22 Figure B.1 Application geometry 23 Figure B.2 CIE goniometer diagram 24 Figure D.1 UK passsenger car 35 Figure D.2 UK large vehicle 36 Figure D.3 Sign location 37 Figure I.1 Variation in entrance angle with distance 66 Figure I.2 Sign locations 67 Licensed Copy: London South Bank University, Lo
14、ndon South Bank University, Fri Dec 08 06:23:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8408:2005 ii BSI 25 May 2005 Table 1 Exceptions to requirements 4 Table 2 Daytime chromaticity and luminance factor for non-fluorescent material 5 Table 3 Night-time chromaticity for non-fluorescent materia
15、l 5 Table 4 Daytime chromaticity and luminance factor for fluorescent material 6 Table 5 Night-time chromaticity for fluorescent material 6 Table 6 Artificial weathering test: test parameters 10 Table 7 Entrance angularity subclasses 11 Table 8 Measurement angles as described using the application r
16、eference system 12 Table 9 Composition of “ by its components “1 and “2 14 Table 10 Values of cos 5 by entrance angle “ 15 Table 11 Colour factors 16 Table 12 Sign location correction factors 21 Table C.1 Transformed headlamp luminous intensity values in candelas for driving on the left based on UMT
17、RI report 2000-36 26 Table C.2 Road distances corresponding to mean observation angles used in calculations 30 Table C.3 Headlamp V and H angles associated with selected road distances 31 Table C.4 Sign distances corresponding to selected road distances 32 Table C.5 Example of interpolation method f
18、or candela values 32 Table C.6 Interpolated candela values from Table C.1: conversion to illuminance in lux, summation and final voltage correction values 33 Table D.1 Distance subclasses 34 Table D.2 Sampling distances 34 Table D.3 Vehicle type 35 Table D.4 Calculated observation angle, ! 37 Table
19、D.5 Selected observation angles 38 Table D.6 Observation angle grouping by distance subclass and vehicle type 38 Table E.1 Values of RA for observation angle ! = 0.25 39 Table E.2 Values of RA for observation angle ! = 0.30 40 Table E.3 Values of RA for observation angle ! = 0.40 40 Table E.4 Values
20、 of RA for observation angle ! = 0.50 41 Table E.5 Values of RA for observation angle ! = 0.65 41 Table E.6 Values of RA for observation angle ! = 0.90 42 Table E.7 Values of RA for observation angle ! = 1.20 42 Table E.8 Values of RA for observation angle ! = 1.50 43 Table E.9 Values of RA for obse
21、rvation angle ! = 2.00 43 Table E.10 Values of RA for observation angle ! = 2.50 44 Table E.11 Values of RA for observation angle ! = 3.00 44 Table E.12 Values of RA for observation angle ! = 4.00 45 Table E.13 RA values reduced for mean of three epsilon () values at 45, 0 and +45 45 Table E.14 RA v
22、alues reduced to lowest value of RA at the relevant orientation angles (6s) 46 Table E.15 RL values derived from RA values in Table E.14 47 Table E.16 RL values reduced for entrance angularity subclasses 47 Table E.17 V1 Luminance values determined from illuminance and RL values for vehicle type V1
23、47 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:23:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8408:2005 BSI 25 May 2005 iii Table E.17 V2 Luminance values determined from illuminance and RL values for vehicle type V2 48 Table E.18A-A1 Luminance Index
24、 A (for directional signs) calculations for V1 passenger car for entrance angularity subclass A1 48 Table E.18A-A2 Luminance Index A (for directional signs) calculations for V1 passenger car for entrance angularity subclass A2 49 Table E.18A-A3 Luminance Index A (for directional signs) calculations
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS 8408 2005
链接地址:https://www.31doc.com/p-3736396.html