The ruling on a female student riding alone with the driver

The questioner : May I ask another question, Shaykh? Yes, my sister rides a bus to go to the university, and sometimes she rides and finds no other female students

The Shaykh : with her except the driver.

The questioner : Yes, and she keeps waiting for about ten minutes, so what is the ruling, Shaykh?

The Shaykh : It is not permissible for her to do that; she must never ride alone with the driver.

The questioner : Is this seclusion, Shaykh?

The Shaykh : Yes, indeed.