The campus police hired students to patrol the campus at night. They wore orange safety vests and carried radios. Most of them also carried large caliber handguns under their vests.
I know that several of the women in the female dorm packed heat around campus too.
Tulane and the adjacent Loyola didn't have much of a rape problem.
A solution that work just as well today. But it's so non-PC, that on todays' campuses it doesn't stand a chance in hell of being implemented (within the rules that is). In spite of state pre-emption laws, in every case I'm aware of, campus weapons bans have been upheld by the courts.
Guns are not allowed on campus. Students who own guns for target shooting or hunting and who live in the residence halls must store their weapons at the Department of Public Safety. By law, no guns are permitted within 1,000 feet of the campus.
Instead they have 33 "Blue Phones" that the would be victim can rush to and effectively "call campus 911", if she can run faster than the rapist, and hold him off while she talks to the Campus Police and while waiting for officer(s) on duty to come to her aid. (Riiight). It's the same at the small Texas college where my wife is a professor, although without the 1000 foot exclusion zone (I think), which would make the unarmed victim zone about 9 times the size of the campus. :)