At the Beitbridge crossing between South Africa and Zimbabwe, pedestrians and passengers wait for immigration documents to be checked. Photographic records show Zimbabwean migrants queued to enter South Africa while Border Management Authority officers inspect passports.
A border queue measures a legal threshold rather than physical distance. People cross the same bridge, but documents, status and mode of travel determine their route and delay. At this heavily used crossing, the pace of movement between two countries can become the pace at which passports are examined one by one.