The most recognised international access symbol is this square overlaid in white with an image of a wheelchair user.
A second symbol is also used in some contexts, which is showing an image of an active wheelchair user, white on a blue background.
There are also other symbols that can be used for inclusive training or awareness in humanitarian action, picturing a more active role of persons with disabilities as participants and leaders.
Symbol of inclusive advocacy that can be used in humanitarian action.
The following symbol indicates access for blind people or those who have low vision. This sign can be used to indicate guided path or tactile information or the way to a distribution point for instance.
You can use the symbol below to point out that Sign Language Interpretation is provided for a meeting, an information session, a focus group discussion or similar activity.
International Symbol of Access - Wikipedia 2016 (external link)
The Graphic Artists Guild