Module F - Slide 24

ModuleF_Slide24

Here are the basics of how the aps sound should be adjusted. The WALK indication must be heard at the beginning of the crosswalk (departing point for pedestrians). The locator tone and walk indication are the same volume, unless there special activation to call audible beaconing which would boost the walk indication and locator tone during the pedestrian phase only. The maximum volume is 100 dB, although basically that’s set by the manufacturers, rather than the installer. The MUTCD states the volume should be set to be 5 db maximum over ambient sound. If may be necessary to take care with adjusting sound if two APS are on one pole. They can amplify each other. If may be necessary to turn off one APS to adjust sound on the other. Then need to evaluate their functioning to make sure they are responding appropriately.