Saudi Arabia is the only country in the world where women are banned from driving a car. This means that women either have to get a chauffeur to drive them, get a male relative to do so, or get a taxi, which is not so safe (public transport is ruled out too, due to the gender segregation rules). The ban is not only annoying and expensive, it can also cost lives, for instance when an emergency happens and someone needs to get to the hospital asap, but no male driver is available.
It’s not a minor offence either, and it’s been heavily criticised, but to no avail as yet. Manal al-Sharif is a Saudi activist who openly defied the driving ban and posted a film on youtube where she’s seen to be driving. She got arrested for it and was held in custody for a few weeks. Official reports say that she has confessed and repents her deed. The latter is not very likely.
Manal is one of the organisers of a protest on June 17 (more here, one source of many). There will be no marches in the street: women will just do what they can and want to do, which is drive their cars.
Needless to say that a campaign has been raised to whip the woman who will drive and various sheikhs who made it their personal mission to make sure no Saudi woman will drive. But Manal and many others are not deterred.