APS Online Workshop: Overview

Module A

Module B1

Module B2

Module C

• Slides 1-10
• Slide 1
• Slide 2
• Slide 3
• Slide 4
• Slide 5
• Slide 6
• Slide 7
• Slide 8
• Slide 9
• Slide 10
• Slides 11-20
• Slides 21-31

Module D

Module E

Module E: Exercises

Module F

Module G

Module C - Slide 10

The automatic volume adjustment makes the sounds respond to ambient sound, so a louder signal is produced when traffic is louder and there's  a quieter signal when traffic is quieter. The volume is supposed to be no more than 2 to 5 dB above ambient sounds. Experience indicates that most APS are installed with volume too loud, rather than too quiet. Often signals are pre-set for the volume range and may need adjustment when installed.