Naomi Ragen is a Jewish author. Sha was born and raised in the States before moving to Israel when she got married. She is also a committed Orthodox Jew. Even so she is involved in a court battle to put an end to gender segregation on Israeli buses after being verbally attacked by a religious fanatic when she refused to move to the rear of the bus on an unmarked ordinary bus.
This article she wrote for The Jewish Chronicle is convincing; there is no need in Judaism for segregated buses. Unsegregated buses do not violate the rules of modesty. Moreover they are distressing, humiliating and only contribute to oppressing women. In other words they are against Jewish law, which prohibits inflicting any form of humiliation and pain on a fellow human being.
For obvious copyright reason, I cannot reproduce the article but you can read about Naomi's abuse and fight on her site.