The National Academies Press, which is the publishing arm of the National Academies of Science, has published a book entitled “Enhancing Airport Wayfinding for Aging Travelers and Persons with Disabilities” as an Airport Cooperative Research Program. Officially, it’s called CRP Research Report 177. You can download a free PDF at https://www.nap.edu/catalog/24930/enhancing-airport-wayfinding-for-aging-travelers-and-persons-with-disabilities. The eight-chapter book spans more than 300 pages, with a list of acronyms, a bibliography and three appendices. You can access individual chapters.