How do novel seat positions impact usability of child restraints?

Abstract Autonomous driving technology and changes in regulations may create an environment that allows novel vehicle interiors. It is important to consider impact on all types of passengers when contemplating interior design, particularly for vehicles that may be used by families with children. We developed a fixture that enables us to change the orientation of each of 4 car seats and used it to simulate three different vehicle interiors. Ten families with children aged 3 months to 7 years interacted with each of the simulated interiors as part of a usability study. Times to install and remove child restraint systems were not significantly different across the three simulated vehicle interiors, but parents were able to release children fastest when using the “X” configuration, which had all seats on a diagonal facing the middle of the vehicle. While overall experience ratings didn’t differ significantly, seven out of ten parents indicated that they liked the “X” configuration better than the other two configurations tested. Reasons included: ability to interact with other passengers, ability to see the road, and legroom/comfort. However, many participants disliked having some passengers not facing forward. Overall, parents liked facing their children, but several said that they would only be comfortable if they could see out of the front windshield; meanwhile, children liked seeing their parents’ faces but also preferred to face forward. Child restraint system and vehicle manufacturers could benefit from considering this study when designing new products.

[1]  Ingrid Pettersson,et al.  Travelling from Fascination to New Meanings: Understanding User Expectations through a Case Study of Autonomous Cars , 2017 .

[2]  Hsiu-Fang Hsieh,et al.  Three Approaches to Qualitative Content Analysis , 2005, Qualitative health research.

[3]  Qing Zhou,et al.  Seating preferences in highly automated vehicles and occupant safety awareness: A national survey of Chinese perceptions , 2020, Traffic injury prevention.

[5]  Jason Forman,et al.  Submarining sensitivity across varied anthropometry in an autonomous driving system environment , 2019, Traffic injury prevention.

[6]  Jonas Andersson,et al.  Designing for social experiences with and within autonomous vehicles – exploring methodological directions , 2018, Design Science.

[7]  Katarina Bohman,et al.  Seating configuration and position preferences in fully automated vehicles , 2019, Traffic injury prevention.

[8]  Maika Katagiri,et al.  A Human Body Model Study on Restraints for Side-Facing Occupants in Frontal Crashes of an Automated Vehicle , 2020 .

[9]  Philip Koopman,et al.  Toward a Framework for Highly Automated Vehicle Safety Validation , 2018 .

[10]  Harsh Sanghavi,et al.  Exploring User Needs and Design Requirements in Fully Automated Vehicles , 2020, CHI Extended Abstracts.

[11]  Patrice D. Tremoulet,et al.  Key factors associated with Australian parents’ willingness to use an automated vehicle to transport their unaccompanied children , 2021 .

[12]  Shamsi T. Iqbal,et al.  Automated Cars as Living Rooms and Offices: Challenges and Opportunities , 2020, CHI Extended Abstracts.

[13]  F. Paternoster,et al.  Automated driving: A biomechanical approach for sleeping positions. , 2020, Applied ergonomics.

[14]  Xin Jin,et al.  Occupant kinematics and biomechanics with rotatable seat in autonomous vehicle collision: a preliminary concept and strategy , 2018 .

[15]  B. Tefft.  American Driving Survey, 2015 – 2016 , 2018 .

[16]  Helen Loeb,et al.  Transporting Children in Autonomous Vehicles: An Exploratory Study , 2020, Hum. Factors.

[17]  Ming Shen,et al.  Occupant kinematics and biomechanics during frontal collision in autonomous vehicles—can rotatable seat provides additional protection? , 2020, Computer methods in biomechanics and biomedical engineering.

[18]  J. Mirman,et al.  Parents’ perspectives on using autonomous vehicles to enhance children’s mobility , 2018, Transportation Research Part C: Emerging Technologies.

[19]  Katarina Bohman,et al.  Seating positions and activities in highly automated cars: a qualitative study of future automated driving scenarios , 2017 .

[20]  Philip Koopman,et al.  Autonomous Vehicle Safety: An Interdisciplinary Challenge , 2017, IEEE Intelligent Transportation Systems Magazine.