This study utilizes a single arm design per the goals of the usability trial. The intervention centers on trialing vehicle seat transfers with and without the Safer Seat.

Participants will be asked to transfer onto/off of the vehicle seat using their normal method of transfer and then to trial transferring onto/off of a vehicle seat with the Safer Seat 1 one or more times with study personnel. Demographic data will be recorded for all participants to include age, sex, and type of mobility disability. Transfers will be observed by the research personnel and success in transfers will be recorded according to the Physical Mobility Scale.

Usefulness and usability of the Safer Seat transfer experience will be reported by participants via Technology Acceptance Model Surveys; and participants will engage in a brief semi structured interview that will be audio recorded and transcribed via Microsoft Teams.

Used to rate ability level in sit to stand and stand to sit transfers from 0 if not able to bear weight, to 5 if independent and not needing to use upper extremities for assistance.

Modified from Davis (1985) surveys to assess Perceived Ease of Use, Perceived Usability, and Attitudes Toward. Survey item responses on 5-item likert scale. Scoring progresses from Strongly Disagree (1) to Strongly Agree (5). For most items "Strongly Agree" indicase the individual favors the intervention. There are a few items phrased in a negative manner such that a response of "Strongly Disagree" indicates the individual favors the intervention; these items are reverse coded when scoring.