12Sign display requirements#
| Item# | MRTS260 Temporary Variable Speed Limit Signs | MRTS Clause | Verification Method | Compliance (Y, TBC, N, N/A) | ||||
|---|---|---|---|---|---|---|---|---|
| 257 | Each sign shall report no less than 4 measurements for each parameter per hour to the connected DP. | 11.3 | X | |||||
| 258 | The display technology must be light emitting diode (LED). | 12.1 | X | |||||
| 259 | To achieve the required sign luminance levels, the display pixels may be formed by arranging one or more LEDs in a cluster. | 12.1 | X | |||||
| 260 | Each individual LED must be driven with a continuous current with no peak and/or magnitudes exceeding 70% of the LED manufacturer's maximum continuous rating. | 12.2 | X | |||||
| 261 | For LEDs in a 5 mm or smaller diameter package, peak magnitudes of the LED current shall not exceed the manufactured rated driving current. | 12.2 | X | |||||
| 262 | The display of numerals for the purpose of speed regulation and information must comply as much as practicable with the fonts defined in Queensland MUTCD. | 12.3 | X | |||||
| 263 | Numerals must meet the fonts defined for use on a Regulatory Sign R4-1. | 12.3 | X | |||||
| 264 | The annulus must not be less in size than that required for an equivalent static sign. | 12.3 | X | |||||
| 265 | The minimum legibility (sight) distance and character height must be as indicated in the Table 12.3 below for both daytime and night-time viewing. | 12.3 | X | |||||
| 266 | Refer to traffic control drawings TC1785 1 and 2 for dimensions of the TVSL sign display. | 12.3 | X | |||||
| 267 | Character heights are specified in standard signs R4- 1 and vary according to whether 2 or 3 numerals are displayed. | 12.3 | X | |||||
| 268 | Display changes must be affected by blanking the display, and then activating all required pixels of the new frame simultaneously. | 12.4 | X | |||||
| 269 | Scrolling of images is not permitted. | 12.4 | X | X | ||||
| 270 | All signs connected to a DP that are instructed to display the same frame must display that frame simultaneously. | 12.4 | X | |||||
| 271 | The sign shall prevent the concurrent display of two frames. | 12.4 | X | |||||
| 272 | There must be no discernible flickering of the display. | 12.4 | X | |||||
| 273 | Background flickering because of checking the ‘on’ and ‘off’ pixel status must not be visible. | 12.4 | X | |||||
| 274 | The display must be able to be reproduced with all required active pixels by camera with shutter speed of up to 1/2000 s. Upon displaying a new frame, the previously displayed frame shall be removed from the sign’s memory. | 12.4 | X | |||||
| 275 | The display must be generated by red and white LEDs on a matte black background. | 12.5 | X | |||||
| 276 | The red and white colours must fall within the chromaticity coordinates specified in AS 5156. | 12.5 | X | |||||
| 277 | Facilities must be included to detect failures within the display control system with the sign defaulting to pre-determined display when major faults are detected. | 12.6 | X | |||||
| 278 | The sign shall blank the display in the event of a sign processor fault. | 12.6 | X | |||||
| 279 | Time to blank shall be a configurable and the range and factory default settings are shown in Appendix A. | 12.6 | X | |||||
| 280 | The sign display must monitor communications with the DP and blank the display if loss of communication experienced. | 12.6 | X | X | ||||
| 281 | The communications timeout period shall be configurable, and the range and factory default settings are shown in Appendix A. | 12.6 | X | |||||
| 282 | The sign shall be able to detect LED failure even if the LEDs may be required to be ‘off’ at the time of the periodic check. | 12.6 | X | |||||
| 283 | The display must be blanked upon failure of 2% of contiguous pixels for each displayed image or failure of more than 20% of LEDs. | 12.6 | X | |||||
| 284 | Single LED failure, provided that the cumulative LED loss remains below the 2% and/or 20% thresholds described above or TVSL light sensor failure, should not result in blanking of the display. | 12.6 | X | |||||
| 285 | Loss of power shall result in blanking of the display. | 12.6 | X | |||||
| 286 | On power restoration, the sign shall become available for activation and remain blank until commanded by the DP. | 12.6 | X | |||||
| 287 | At no time shall partial or incomplete frames be displayed. | 12.6 | X | |||||
| 288 | The red annulus must consist of suitably constructed, evenly spaced pixel rings in accordance with Table 12.7 below. | 12.7 | X | |||||
| 289 | The number of rings to flash shall be counted from the inner ring. | 12.7 | X | |||||
| 290 | The outer ring(s) shall maintain an apparent solid ring to satisfy the regulatory status of the sign. | 12.7 | X | |||||
| 291 | When displaying the default speed limit, all pixel rings of the annulus must be illuminated. | 12.7 | X | |||||
| 292 | The annulus shall be constructed so that LEDs connected in series are separated physically by at least 3 LEDs from other circuits. | 12.7 | X | |||||
| 293 | The sign shall allow selectable flashing of the whole and/or part of the display via all the communications ports. | 12.8 | X | |||||
| 294 | The flash rate parameters must be configurable and be selectable via all the communications ports as specified in Appendix A. | 12.8 | X | |||||
| 295 | The red annulus must be designed so that the inner rings of the annulus can be flashed as an independent event. | 12.8.1 | X | |||||
| 296 | In partial flash mode, between 50% and 75% of the total number of annulus pixel rings must flash. | 12.8.1 | X | |||||
| 297 | The inner diameter pixel ring(s) of the annulus must flash while the remaining outer ring(s) of the annulus must remain lit. | 12.8.1 | X | |||||
| 298 | No conspicuity devices or lanterns are required. | 12.8.2 | X | |||||
| 299 | However, the sign shall allow conspicuity devices to be added in future if desired. | 12.8.2 | X | |||||
| Visual Inspection | NATA Certification | Field OR Bench Test | Detailed Drawings | Other records (Datasheets, internal testing, RPEQ) | ||||
| 300 | The optical performance must be determined by measurement under laboratory conditions of the following parameters listed in Tables 12.3 and 12.9.3 below: a) minimum luminance ratio b) minimum and maximum luminance and luminous intensity uniformity c) viewing angle, and d) colour as per AS 156. | 12.9.1 | X | |||||
| 301 | The performance of the TVSL sign displays must meet or exceed the luminance and chromaticity parameters defined in AS 5156. | 12.9.1 | X | |||||
| 302 | The luminance of the LEDs, when measured under laboratory conditions, must comply with the requirements of AS 5156. | 12.9.2 | X | |||||
| 303 | The luminance intensity half angle must comply with Table 12.9.3. | 12.9.3 | X | |||||
| 304 | The effect of sunlight or other light sources shining on the optical elements must be controlled such that inactive pixels do not appear active. | 12.9.4 | X |
Table in words
- Item 257: Each sign shall report no less than 4 measurements for each parameter per hour to the connected DP.
- Item 258: The display technology must be light emitting diode (LED).
- Item 259: To achieve the required sign luminance levels, the display pixels may be formed by arranging one or more LEDs in a cluster.
- Item 260: Each individual LED must be driven with a continuous current with no peak and/or magnitudes exceeding 70% of the LED manufacturer's maximum continuous rating.
- Item 261: For LEDs in a 5 mm or smaller diameter package, peak magnitudes of the LED current shall not exceed the manufactured rated driving current.
- Item 262: The display of numerals for the purpose of speed regulation and information must comply as much as practicable with the fonts defined in Queensland MUTCD.
- Item 263: Numerals must meet the fonts defined for use on a Regulatory Sign R4-1.
- Item 264: The annulus must not be less in size than that required for an equivalent static sign.
- Item 265: The minimum legibility (sight) distance and character height must be as indicated in the Table 12.3 below for both daytime and night-time viewing.
- Item 266: Refer to traffic control drawings TC1785 1 and 2 for dimensions of the TVSL sign display.
- Item 267: Character heights are specified in standard signs R4- 1 and vary according to whether 2 or 3 numerals are displayed.
- Item 268: Display changes must be affected by blanking the display, and then activating all required pixels of the new frame simultaneously.
- Item 269: Scrolling of images is not permitted.
- Item 270: All signs connected to a DP that are instructed to display the same frame must display that frame simultaneously.
- Item 271: The sign shall prevent the concurrent display of two frames.
- Item 272: There must be no discernible flickering of the display.
- Item 273: Background flickering because of checking the ‘on’ and ‘off’ pixel status must not be visible.
- Item 274: The display must be able to be reproduced with all required active pixels by camera with shutter speed of up to 1/2000 s. Upon displaying a new frame, the previously displayed frame shall be removed from the sign’s memory.
- Item 275: The display must be generated by red and white LEDs on a matte black background.
- Item 276: The red and white colours must fall within the chromaticity coordinates specified in AS 5156.
- Item 277: Facilities must be included to detect failures within the display control system with the sign defaulting to pre-determined display when major faults are detected.
- Item 278: The sign shall blank the display in the event of a sign processor fault.
- Item 279: Time to blank shall be a configurable and the range and factory default settings are shown in Appendix A.
- Item 280: The sign display must monitor communications with the DP and blank the display if loss of communication experienced.
- Item 281: The communications timeout period shall be configurable, and the range and factory default settings are shown in Appendix A.
- Item 282: The sign shall be able to detect LED failure even if the LEDs may be required to be ‘off’ at the time of the periodic check.
- Item 283: The display must be blanked upon failure of 2% of contiguous pixels for each displayed image or failure of more than 20% of LEDs.
- Item 284: Single LED failure, provided that the cumulative LED loss remains below the 2% and/or 20% thresholds described above or TVSL light sensor failure, should not result in blanking of the display.
- Item 285: Loss of power shall result in blanking of the display.
- Item 286: On power restoration, the sign shall become available for activation and remain blank until commanded by the DP.
- Item 287: At no time shall partial or incomplete frames be displayed.
- Item 288: The red annulus must consist of suitably constructed, evenly spaced pixel rings in accordance with Table 12.7 below.
- Item 289: The number of rings to flash shall be counted from the inner ring.
- Item 290: The outer ring(s) shall maintain an apparent solid ring to satisfy the regulatory status of the sign.
- Item 291: When displaying the default speed limit, all pixel rings of the annulus must be illuminated.
- Item 292: The annulus shall be constructed so that LEDs connected in series are separated physically by at least 3 LEDs from other circuits.
- Item 293: The sign shall allow selectable flashing of the whole and/or part of the display via all the communications ports.
- Item 294: The flash rate parameters must be configurable and be selectable via all the communications ports as specified in Appendix A.
- Item 295: The red annulus must be designed so that the inner rings of the annulus can be flashed as an independent event.
- Item 296: In partial flash mode, between 50% and 75% of the total number of annulus pixel rings must flash.
- Item 297: The inner diameter pixel ring(s) of the annulus must flash while the remaining outer ring(s) of the annulus must remain lit.
- Item 298: No conspicuity devices or lanterns are required.
- Item 299: However, the sign shall allow conspicuity devices to be added in future if desired.
- For item 300, the optical performance must be determined by measurement under laboratory conditions of the following parameters listed in Tables 12.3 and 12.9.3 below: a) minimum luminance ratio b) minimum and maximum luminance and luminous intensity uniformity c) viewing angle, and d) colour as per AS 156.
- For item 301, the performance of the TVSL sign displays must meet or exceed the luminance and chromaticity parameters defined in AS 5156.
- For item 302, the luminance of the LEDs, when measured under laboratory conditions, must comply with the requirements of AS 5156.
- For item 303, the luminance intensity half angle must comply with Table 12.9.3.
- For item 304, the effect of sunlight or other light sources shining on the optical elements must be controlled such that inactive pixels do not appear active.