This study will examine multi-tasking behaviors when drivers are in environments that include large numbers of pedestrians and cyclists. Multi-tasking behavior refers to any secondary activity not related to the primary driving task, such as engagement in mobile devices, eating, drinking, or talking to passengers. More specifically, this study will focus on the likelihood of drivers engaging in (or disengaging from) secondary task activities given the presence of pedestrians and cyclists, and the effect of different types of crosswalks and bike lanes (including pavement markings and signage) on secondary task activities. Naturalistic driving data is critical to achieve the objectives of this study, as it offers detailed and objective information about the type and frequency of driver distracting behaviors in everyday driving situations.

Strategic Highway Research Program (SHRP) 2 data provides an opportunity to examine the impact of driver behavior at various pedestrian crosswalks and bike lanes, which are often co-located with other multimodal infrastructure (e.g., transit stops, park-and-rides). Many studies on crosswalks and bike lanes are based on the bird’s eye perspective (using video cameras mounted on the road) or surveys, and do not provide insights on why the driver was distracted, how long they were distracted, and how likely they are to be distracted on the approach to these transportation infrastructures.

• 693JJ320F000081

• Safety

• FY 2002-2022 / Safety / Safety Design and Operations

• Naturalistic Driving Study Pooled Fund