The association has two categories of membership, full membership with voting rights for road agencies/authorities and associate membership participating in an ex-officio capacity without voting rights for transport professionals and private industry representatives concerned with transport issues.

Currently, the association has ten full active members and these include Angola, Botswana, Lesotho, Malawi, Mozambique, Namibia, South Africa, Tanzania, Zambia and Zimbabwe. The other members are Democratic Republic of Congo (DRC), Mauritius and Swaziland.