New York

'You know when you have a bird, and it's been in a cage all its life? When you open the cage door, it doesn't want to leave. It was that moment."

This is how Manal al-Sharif felt the first time she sat behind the wheel of a car in Saudi Arabia. The kingdom's taboo against women driving is only rarely broken. To hear her recount the experience is as thrilling as it must have been to sit in the passenger seat beside her. Well, almost.

Ms. Sharif says her moment of hesitation didn't last long. She pressed the gas pedal and in an instant her Cadillac SUV rolled forward. She spent the next hour circling the streets of Khobar, in the kingdom's eastern province, while a friend used an iPhone camera to record the journey.

It was May 2011, when much of the Middle East was convulsed with popular uprisings. Saudi women's-rights activists were stirring, too. They wondered if the Arab Spring would mark the end of the kingdom's ban on women driving. "Everyone around me was complaining about the ban but no one was doing anything," Ms. Sharif says. "The Arab Spring was happening all around us, so that inspired me to say, 'Let's call for an action instead of complaining.' "