Changes

One goes to [[Ksar Torchane]] not far north, towards the train stop at [[Choum]]. It's very unlikely to get a lift here although bush taxis do the run for about 1500 ouguiya

The fourth goes south to [[Nouakchott]] and to [[Aïn Ehel Taya]], where there is an army checkpoint at the turn-off for [[Terjît]] and [[Ouadâne]]. The military here are initially official but become friendly after you've chatted with them for a bit and can get passers-by to pick you up. It's possible to get a lift to [[Nouakchott]] but more likely that you'll end up taking a bush taxi.