The American with Disabilities Act resulted in the adoption of designs standards intended to make public accommodations accessible to individuals using wheelchairs. However when thinking about remodeling your own bathroom for accessibility don’t resort to ADA standards as a default design. Larger wheelchairs often require a turn radius in excess of ADA standards. Conversely you may not require full implementation of ADA standards to meet your needs.
Our recommendation is to have an experienced contractor (More about contractor selection at a later date) visit your home, watch how you maneuver in your bathroom, and develop a design based on direct observations. Otherwise you could be one among those who learned the hard way and has a bathroom that meets ADA standards but remains inaccessible to you.