APPENDIX 4 — REQUIREMENTS CONCERNING DESIGN OF TAXIING GUIDANCE SIGNS Besluit toezicht luchtvaart BES
REQUIREMENTS CONCERNING DESIGN OF TAXIING GUIDANCE SIGNS
Note – See Chapter 5, Section 5.4 for specifications on the application, location and characteristics of signs.
1. Inscription heights shall conform to the following tabulation.
Note – Where a taxiway location sign is installed in conjunction with a runway designation sign (see 5.4.3.22), the character size shall be that specified for mandatory instruction signs.
2. Arrow dimensions shall be as follows:
Legend height | Stroke
200 mm | 32 mm
300 mm | 48 mm
400 mm | 64 mm
3. Stroke width for single letter shall be as follows:
Legend height | Stroke
200 mm | 32 mm
300 mm | 48 mm
400 mm | 64 mm
4. Sign luminance shall be as follows:
a) Where operations are conducted in runway visual range conditions less than a value of 800 m, average sign luminance shall be at least:
Red | 30 cd/m2
Yellow | 150 cd/m2
White | 300 cd/m2
b) Where operations are conducted in accordance with 5.4.1.7 b) and c) and 5.4.1.8, average sign luminance shall be at least:
Red | 10 cd/m2
Yellow | 50 cd/m2
White | 100 cd/m2
Note – In runway visual range conditions less than a value of 400 m, there will be some degradation in the performance of signs.
5. The luminance ratio between red and white elements of a mandatory sign shall be between 1:5 and 1:10.
6. The average luminance of the sign is calculated by establishing grid points as shown in Figure A4-1 and using the luminance values measured at all grid points located within the rectangle representing the sign.
7. The average value is the arithmetic average of the luminance values measured at all considered grid points.
Note – Guidance on measuring the average luminance of a sign is contained in the Aerodrome Design Manual, Part 4.
8. The ratio between luminance values of adjacent grid points shall not exceed 1.5:1. For areas on the sign face where the grid spacing is 7.5 cm, the ratio between luminance values of adjacent grid points shall not exceed 1.25:1. The ratio between the maximum and minimum luminance value over the whole sign face shall not exceed 5:1.
9. The forms of characters, i.e. letters, numbers, arrows and symbols, shall conform to those shown in Figure A4-2. The width of characters and the space between individual characters shall be determined as indicated in Table A4-1.
10. The face height of signs shall be as follows:
Legend height | Face height (min)
200 mm | 400 mm
300 mm | 600 mm
400 mm | 800 mm
11. The face width of signs shall be determined using Figure A4-3 except that, where a mandatory instruction sign is provided on one side of a taxiway only, the face width shall not be less than:
a) 1.94 m where the code number is 3 or 4; and
b) 1.46 m where the code number is 1 or 2.
Note – Additional guidance on determining the face width of a sign is contained in the Aerodrome Design Manual, Part 4.
12. Borders
a) The black vertical delineator between adjacent direction signs shall have a width of approximately 0.7 of the stroke width.
b) The yellow border on a stand-alone location sign shall be approximately 0.5 stroke width.
13. The colors of signs shall be in accordance with the appropriate specifications in Appendix 1.
- Regeling
- Besluit toezicht luchtvaart BES
- Soort
- AMvB-BES
- Geldend vanaf
- 01-01-2021
- BWB-id
- BWBR0028721
- Versie
- 2021-01-01_0