**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 1**  **of 17**  

### ICC A **117.1 Section 703 703 Signs**  **703.1 General.** Accessible signs shall comply with Section 703. Tactile signs shall contain both raised characters and braille. Where signs with both visual and raised characters are required, either one sign with both visual and raised characters, or two separate signs, one with visual, and one with raised characters, shall be provided. **703.1.1 Designations.** Interior and exterior signs identifying per manent rooms and spaces shall comply with Sections 703.1, 703.2, and 703.3. **EXCEPTION:** Exterior signs that are not located at the door to the space they serve shall not be required to comply with Section 703.3. **703.1.2 Directional and Informational Signs**
**.** Signs that provide direction to or information about interior spaces and facilities of the site shall comply with Section 703.2. **703.1.3 Pictograms.** Wh ere pictograms are provided as designations of permanent interior rooms and spaces, the pictograms sha ll comply with Section 703.5 and shall have text descriptors located directly below the pictogram field and complying with Sections 703.2 and 703.3. **EXCEPTION:** Pictograms that provide information about a room or space, such as “No Smoking”, occupant logos, and the International Symbol of Accessibility, are not required to have text descriptors.

**703.2 Visual Characters.**

**703.2.1 General.** Visual characters shall comply with the following: 1. Visual characters that also serve as raised characters shall comply with Section 703.3, or 2. Visual characters on VMS signage shall comply with Section 703.7, or 3. Visual characters not covered in items 1 and 2 shall comply with Section 703.2.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 2**  **of 17** 



### EXCEPTION: The visual and raised requirements of item 1 shall be permitted to be provided by two separate signs that provide corresponding information provided one sign complies with Section 703.2 and the second sign complies with Section 703.3. **703.2.2 Case.** Characters shall be uppercase, lowercase, or a combinatio n of both. **703.2.3 Sty le.**  Characters shall be conventional in form. Characters shall not be italic, oblique, script, highly decorative, or of other unusual forms. **703.2.4 Character Height.** The uppercase letter “I” shall be used to determine the allowable height of all characters of a font. The uppercase letter “I” of the font shall have a minimum height complying with Table 703.2.4. Viewing distance shall be measured as the horizontal distance between the character and an obstruction preventing further ap proach towards the sign. **EXCEPTION:** In assembly seating where the maximum viewing distance is 100 feet (30.5 m) or greater, the height of the uppercase “I” of fonts shall be permitted to be 1 inch (25 mm) for every 30 feet (9145 mm) of viewing distance, p rovided the character height is 8 inches (205 mm) minimum. Viewing distance shall be measured as the horizontal distance between the character and where someone is expected to view the sign. **TA BLE 703.2.4** **— VISUAL CHA**  **RA CTER HEIGHT**  **Height above Floor to Bas eline** 

**of Character Horizontal Viewing Distance**  **Mi nimum Character Height** 

40 inches (1015 mm) to less than or equal to 70 inches (1780 mm) Less than 6 feet (1830 mm) 5/ 8 inch (16 mm)

6 feet (1830 mm) and greater 5/ 8 inch (16 mm), plus 1 /8 inch (3.2 mm) per foot (305 mm) of viewing distance above 6 feet (1830 mm) Greater than 70 inches (1780 mm) to less than or equal to 120 inches (3050 mm) Less than 15 feet (4570 mm) 2 inches (51 mm)
15 feet (4570 mm) and greater 2 inches (51 mm), plus 1 / 8 inch (3.2 mm) per foot (305 mm) of viewing distance above 15 feet (4570 mm)
Greater than 120 inches (3050 mm) Less than 21 feet (6400 mm) 3 inches (75 mm)
21 feet (6400 mm) and greater 3 inches (75 mm), plus 1 / 8 inch (3.2 mm) per foot (305 mm) of viewing distance above 21 feet (6400 mm)**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 3**  **of 17**  

### 703.2.5 Character Width. The uppercase letter “O” shall be used to determine the allowable width of all characters of a font. The width of the uppercase letter “O” of the font shall be 55 percent minimum and 110 percent maximum of the height of the uppercase “I” of the font. **703.2.6 Stroke Width.** The uppercase letter “I” shall be used to determine the allowable stroke width of all characters of a font. The stroke width shall be 10 percent minimum and 30 percent ma ximum of the height of the uppercase “I” of the font. **703.2.7 Character Spacing.** Spacing shall be measured between the two closest points of adjacent characters within a message, excluding word spaces. Spacing between individual characters shall be 10 percent minimum and 35 percent maximum of the character height. **703.2.8 Line Spacing.** Spacing between the baselines of separate lines of characters within a message shall be 135 percent minimum and 170 percent maximum of the character height. **EXCEPTION:** In assembly seating where the maximum viewing distance is 100 feet (30.5 m) or greater, the spacing between the baselines of separate lines of characters within a message shall be permitted to be 120 percent minimum and 170 percent maximum of the character he ig ht. **703.2.9 Height A bove Floor.**  Visual characters shall be 40 inches (1015 mm) minimum above the floor of the viewing position, measured to the baseline of the character. Heights shall comply with Table 703.2.4, based on the size of the characters on th e sign. **EXCEPTION:** Visual characters indicating elevator car controls shall not be required to comply with Section 703.2.9. **703.2.10 Finish and Contrast.** Characters and their background shall have a non
- glare finish. Characters shall contrast with their background, with either light characters on a dark background, or dark characters on a light background. **703.3 Raised Characters. 703.3.1 General.**  Raised characters shall comply with Section 703.3, and shall be duplicated in braille complying with Sectio n 703.4. **703.3.2 Depth.** Raised characters shall be raised 1 / 32 

### inch (0.8 mm) minimum above their background.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 4**  **of 17**  

### 703.3.3 Case. Characters shall be uppercase. **703.3.4 Sty le.**  Characters shall be sans serif. Characters shall not be italic, oblique, script, highly decorative, or of other unusual forms. **703.3.5 Character Height.** The uppercase letter “I” shall be used to determine the allowable height of all characters of a font. The height of the uppercase letter “I” of the font, measured vertically from the baseline of the character, shall be 5/8 

### inch (16 mm) minimum, and 2 inches (51 mm) maximum. **EXCEPTION:** Wh ere separate raised and visual characters with the same information are provided, the height of the raised uppercase letter “I” shall be permitted to be 1 /2 

### inch (13 mm) minimum.

FIGURE 703.3.5 CHARACTER HEIGHT **703.3.6 Character Width.** The uppercase letter “O” shall be used to determine the allowable width of all characters of a font. The width of the uppercase letter “O” of the font shall be 55 percent minimum and 110 percent maximum of the height of the uppercase “I” of the font.
**703.3.7 Stroke Width.** Raised character stroke width shall comply with Section 703.3.7. The uppercase letter “I” of the font shall be used to determine the allowable s troke width of all characters of a font.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 5**  **of 17**  

### 703.3.7.1 Maximum. The stroke width shall be 15 percent maximum of the height of the uppercase letter “I” measured at the top surface of the character, and 30 percent maximum of the height of the uppercase letter “ I” measured at the base of the character. **703.3.7.2 Minimum.** Wh en characters are both visual and raised, the stroke width shall be 10 percent minimum of the height of the uppercase letter “I”. **703.3.8 Character Spacing.** Character spacing shall be measured between the two closest points of adjacent raised characters within a message, excluding word spaces. Spacing between individual raised characters shall be 1 /8 

### inch (3.2 mm) minimum measured at the top surface of the cha racters, 1 / 16 

### inch (1.6 mm) minimum measured at the base of the characters, and four times the raised character stroke width maximum. Characters shall be separated from raised borders and decorative elements 3/8 

### inch (9.5 mm) minimum. **703.3.9 Line Spacing**
**.** Spacing between the baselines of separate lines of raised characters within a message shall be 135 percent minimum and 170 percent maximum of the raised character height. **703.3.10 Height above Floor.** Raised characters shall be 48 inches (1220 mm) minimum above the floor, measured to the baseline of the lowest raised character and 60 inches (1525 mm) maximum above the floor, measured to the baseline of the highest raised character. **EXCEPTION:** Raised characters for elevator car controls shall not be required to comply with Section 703.3.10.

Note: For braille character mounting height see Section 703.4.5**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 6**  **of 17**  

### FIGURE 703.3.10 HEIGHT OF RAISED CHARACTERS ABOVE FLOOR **703.3.11 Location.** Wh ere a sign containing raised characters and braille is provided at a door, the sign shall be alongside the door at the latch side. Wh ere a sign containing raised characters and braille is provided at double doors with one active leaf, the sign shall be located on the inactive leaf. Wh ere a sign containing raised characte rs and braille is provided at double doors with two active leaves, the sign shall be to the right of the right
- hand door. Wh ere there is no wall space on the latch side of a single door, or to the right side of double doors, signs shall be on the nearest a djacent wall. Signs containing raised characters and braille shall be located so that a clear floor area 18 inches (455 mm) minimum by 18 inches (455 mm) minimum, centered on the raised characters is provided beyond the arc of any door swing between the cl osed position and 45 degree open position. **EXCEPTION:** Signs containing raised characters and braille shall be permitted on the push side of doors with closers and without hold
- open devices.

FIGURE 703.3.11 LOCATIONS OF SIGNS AT DOORS
**703.3.12 Finish and Contrast.**  Characters and their background shall have a non
- glare finish. Characters shall contrast with their background with either light characters on a dark background, or dark characters on a light background. **EXCEPTION:** Wh ere separate rais ed characters and visual characters with the same information are provided, raised characters are not required to have nonglare finish or to contrast with their background.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 7**  **of 17**  

### 703.4 Braille **703.4.1 General.** Braille shall be contracted (Grade 2) braille and shall comply with Section 703.4. **703.4.2 Uppercase Letters.** The indication of an uppercase letter or letters shall only be used before the first word of sentences, proper nouns and names, individual letters of the alphabet, initials, or acronyms. **703.4. 3 Dimensions.**  Braille dots shall have a domed or rounded shape and shall comply with Table 703.4.3.
**TA BLE 703.4.3**  **— BRA** **ILLE DIMENSIONS**
**Me asurement range**  **Mi nimum in inches**  **Ma ximum in inches**  Dot base diameter 0.059 (1.5 mm) to 0.063 (1.6 mm) Distance between two dots in the same cell 0.090 (2.3 mm) to 0.100 (2.5 mm) Distance between corresponding dots in adjacent cells 1 0.241 (6.1 mm) to 0.300 (7.6 mm) Dot height 0.025 (0.6 mm) to 0.037 (0.9 mm) Distance between corresponding dots from one cell directly below 1 0.395 (10.0 mm) to 0.400 (10.2 mm)

1 Measured center to center**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 8**  **of 17**  

### FIGURE 703.4.3 BRAILLE MEASUREMENT **703.4.4 Position.** Braille shall be below the corresponding text. If text is multilined , braille shall be placed below entire text. Braille shall be separated 3/8 

### inch (9.5 mm) minimum from any other raised characters and 3/8 

### inch (9.5 mm) minimum from raised borders and decorative elements. Braille provided on elevator car controls shall be separated 3/ 16 

### inch (4.8 mm) minimum either directly below or adjacent to the corresponding raised characters or symbols.

FIGURE 703 .4.4 POSITION OF BRAILLE **703.4.5 Mounting Height.** Braille shall be 48 inches (1220 mm) minimum and 60 inches (1525 mm) maximum above the floor, measured to the baseline of the braille cells. **EXCEPTION:** Elevator car controls shall not be required to compl y with Section 703.4.5.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 9**  **of 17**  Note: For raised character mounting height see Section 703.3.10 

### FIGURE 703.4.5 HEIGHT OF BRAILLE CHARACTERS ABOVE FLOOR **703.5 Pictograms.**

FIGURE 703.5 PICTOGRAM FIELD **703.5.1 General.** Pictograms shall comply with Section 703.5.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 10**  **of 17**  

### 703.5.2 Pictogram Field. Pictograms shall have a field 6 inches (150 mm) minimum in height. Characters or braille shall not be located in the pictogram field. **703.5.3 Finish and Contrast.** Pictograms and their fields shall have a nonglare finish. P ictograms shall contrast with their fields, with either a light pictogram on a dark field or a dark pictogram on a light field. **703.6 Sy mbols of A** **ccessibility .**  **703.6.1 General.** Symbols of accessibility shall comply with Section 703.6. **703.6.2 Finish and Contrast.**  Symbols of accessibility and their backgrounds shall have a non
- glare finish. Symbols of accessibility shall contrast with their backgrounds, with either a light symbol on a dark background or a dark symbol on a light background. **703.6.3 Sy mbol**  **s. 703.6.3.1 International Sy**  **mbol of A ccessibility**  **.** The International Symbol of Accessibility shall comply with Figure 703.6.3.1.

FIGURE 703.6.3.1 INTERNATIONAL SYMBOL OF ACCESSIBILITY **703.6.3.2 International Sy mbol of TTY.**  The International Symbol of TTY shall comply with Figure 703.6.3.2.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 11**  **of 17**  

### FIGURE 703.6.3.2 INTERNATIONAL TTY SYMBOL **703.6.3.3 A**

**ssistive Listening Sy**

**stems.** Assistive listening systems shall be identified by the International Symbol of Access for Hearing Loss complying with Figure 7 03.6.3.3.

FIGURE 703.6.3.3 INTERNATIONAL SYMBOL OF ACCESS FOR HEARING LOSS **703.6.3.4 Volume -**  **Controlled Telephones.** Telephones with volume controls shall be identified by a pictogram of a telephone handset with radiating sound waves on a square field complying with Figure 703.6.3.4.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 12**  **of 17**  

### FIGURE 703.6.3.4 VOLUME
- CONTROLLED TELEPHONE **703.7 Variable Message Signs. 703.7.1 General.**  High resolution variable message sign (VMS) characters shall comply with Sections 703.2 and 703.7.12 through 703.7.14. Low resolution variable message sign (VMS) characters shall comply with Section 703.7. **EXCEPTION:** Theatrical performance related VMS signs, including but not limited to, text and translation delivery systems, surtitles and subtitles, shall not be required to comply with Section 703.7.1. **703.7.2 Case.** Low resolution VMS characters shall be uppercase. **703.7.3 Sty le.**  Low resolution VMS characters shall be conventional in form, shall be san serif, and shall not be italic, oblique, script, highly decorative, or of o ther unusual forms. **703.7.4 Character Height.** The uppercase letter “I” shall be used to determine the allowable height of all low resolution VM S characters of a font. Viewing distance shall be measured as the horizontal distance between the character and an obstruction preventing further approach towards the sign. The uppercase letter “I” of the font shall have a minimum height complying with Table 703.7.4. **EXCEPTION:** In assembly seating where the maximum viewing distance is 100 feet (30.5 m) or great er, the height of the uppercase “I” of low resolution VMS fonts shall be permitted to be 1 inch (25 mm) for every 30 feet (9145 mm) of viewing distance, provided the character height is 8 inches (205 mm) minimum. Viewing distance shall be measured as the h orizontal distance between the character and where someone is expected to view the sign. **TA BLE 703.7.4** **— LOW RESOLUTION VMS CHA**  **RA CTER HEIGHT**  **Height above Floor to Baseline**

**of Character Horizontal Viewing Distance**  **Mi nimum Character Height** 
40 inches (1015 mm) to less than or equal to 70 inches (1780 mm) Less than 10 feet (3050 mm) 2 inches (51 mm)
10 feet (3050 mm) and greater 2 inches (51 mm), plus 1 / 5 inch (5.1 mm) per foot (305 mm) of viewing distance above 10 feet (3050 mm) Greater than 70 inches (1780 mm) to less than or equal to 120 inches Less than 15 feet (4570 mm) 3 inches (75 mm) 15 feet (4570 mm) and greater 3 inches (75 mm), plus 1 / 5 inch**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 13**  **of 17**  (3050 mm) (5.1 mm) per foot (305 mm) of viewing distance above 15 feet (4570 mm)

Greater than 120 inches (3050 mm) Less than 20 feet (6095 mm) 4 inches (100 mm)
20 feet (6095 mm) and greater 4 inches (100 mm), plus 1 / 5 inch (5.1 mm) per foot (305 mm) of viewing distance above 20 feet (6095 mm) 

### 703.7.5 Character Width. The uppercase letter “O” shall be used to determine the allowable width of all low resolution VM S characters of a font. Low resolution VMS characters shall comply with the pixel count for character width in Table 703.7.5.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 14**  **of 17**  

### FIGURE 703.7.5

LOWRESOLUTION VMS SIGNAGE CHARACTERS**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 15**  **of 17**  

### TA **BLE 703.7.5 —**  **PIXEL COUNT FOR LOW RESOLUTION VMS SIGNA GE**  **1 Character Height**  **Character Width Range**  **Stroke Width Range Character Spacing**  **Range** 7 5
- 6 1 2 8 6
- 7 1
- 2 2
- 3 9 6
- 8 1
- 2 2
- 3 10 7
- 9 2 2
- 4 11 8
- 10 2 2
- 4 12 8
- 11 2 3
- 4 13 9
- 12 2
- 3 3
- 5 14 10
- 13 2
- 3 3
- 5 15 11
- 14 2
- 3 3
- 5 (1) Measured in pixels. 

### 703.7.6 Stroke Width. The uppercase letter “I” shall be used to determine the allowable stroke width of all low resolution VMS characters of a font. Low resolution VMS characters shall comply with the pixel count for stroke width in Table 703.7.5. **703.7.7 Character Spacing.** Spacing shall be measured between the two closest points of adjacent low resolution VMS characters within a message, excluding word spaces. Low resolution VMS character spacing shall com ply with the pixel count for character spacing in Table 703.7.5. **703.7.8 Line Spacing.** Low resolution VMS characters shall comply with Section 703.2.8. **703.7.9 Height A bove Floor.**  Low resolution VMS characters shall be 40 inches (1015 mm) minimum above t he floor of the viewing position, measured to the baseline of the character. Heights of low resolution variable message sign characters shall comply with Table 703.7.4, based on the size of the characters on the sign. **703.7.10 Finish.** The background of Low resolution VMS characters shall have a non
- glare finish. **703.7.11 Contrast.** Low resolution VMS characters shall be light characters on a dark background. **703.7.12 Protective Covering.** Wh ere a protective layer is placed over VMS characters through which the VMS characters must be viewed, the protective covering shall have a non
- glare finish. **703.7.13 Brightness.** The brightness of variable message signs in exterior locations shall automatically adjust in response to changes in ambient light levels.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 16**  **of 17**  

### 703. **7.14 Rate of Change.** Wh ere a VMS message can be displayed in its entirety on a single screen, it shall be displayed on a single screen and shall remain motionless on the screen for a minimum 3 seconds or one second minimum for every 7 characters of the mes sage including spaces wh ichever is longer. **703.8 Remote Infrared A udible Sign (RIA** **S) Systems. 703.8.1 General.**  Remote Infrared Audible Sign Systems shall comply with Section 703.8. **703.8.2 Transmitters.** Wh ere provided, Remote Infrared Audible Sign Trans mitters shall be designed to communicate with receivers complying with Section 703.8.3. **703.8.3 Infrared A udible Sign Receivers.**  **703.8.3.1 Frequency**
**.** Basic speech messages shall be frequency modulated at 25 kHz, with a +/
- 2.5 kHz deviation, and shall have an infrared wavelength from 850 to 950 nanometer (nm). **703.8.3.2 Optical Po wer Density**  **.** Receiver shall produce a 12 decibel (dB) signal
- plus
- noise
- to
- noise ratio with a 1 kHz modulation tone at +/
- 2.5 kHz deviation of the 25 kHz subcarrier at an opt ical power density of 26 picowatts per square millimeter measured at the receiver photosensor aperture. **703.8.3.3 A udio Output.**  The audio output from an internal speaker shall be at 75 dBA minimum at 18 inches (455 mm) with a maximum distortion of 10 perc ent. **703.8.3.4 Reception Range.** The receiver shall be designed for a high dynamic range and capable of operating in full
sun background illumination. **703.8.3.5 Multiple Signals.** A receiver provided for the capture of the stronger of two signals in the re ceiver field of view shall provide a received power ratio on the order of 20 dB for negligible interference. **703.9 Pedestrian Signals.** Accessible pedestrian signals shall comply with Section 4E.06
-Accessible Pedestrian Signals, and Section 4E.09
-Accessib le Pedestrian Signal Detectors, of the Manual on Uniform Traffic Control Devices listed in Section 105.2.1.**Section 703**

**Excerpted from the**  **Accessible and Usable Buildings and Facilities ICC A117.1 -** **2009, Copyright 2010. Washington,**  **D.C.: International Code Council.**  **Reproduced with permission. All rights reserved. www.ICCSAFE.org**  **Page 17**  **of 17**  

### EXCEPTION: Pedestrian signals are not required to comply with the requirement for choosing audible tones.