APS Online Workshop: Overview

Module A

Module B1

Module B2

Module C

Module D

• Slides 1-10
• Slides 11-20
• Slides 21-30
• Slides 31-40
• Slide 31
• Slide 32
• Slide 33
• Slide 34
• Slide 35
• Slide 36
• Slide 37
• Slide 38
• Slide 39
• Slide 40
• Slides 41-43

Module E

Module E: Exercises

Module F

Module G

Module D - Slide 32

A lead pedestrian interval gives pedestrians a head start on vehicles that may be turning right across the crosswalk. These diagrams show a sighted pedestrian making the crossing. Without an audible signal from APS, blind pedestrians will not know that pedestrians are being given a headstart before the parallel vehicle green. Several seconds later, when they hear they parallel traffic begin to go, they will begin their crossing. This behavior may be unexpected by drivers, leading to potential conflict. Also, the pedestrian may not have sufficient time to finish crossing, depending on the signal timing design.