adopted lab potty troubles

i adopted a 1 year old lab from a no kill shelter about a year ago. i was sucessfull with crate training and she has become a very loving dog. i no longer lock her in the crate while i am gone, she is either outside or sleeping on the couch/bed. My problem is she doesn't have the ability to hold her pee for very long, especialy being 2 years or older. also, she doesn't give any noticable signs she has to pee. she will sometimes lay down in the hall way and look at me, but this is an activity that she does often, no only when she needs to pee. we don't know her past before we got her, but we do know she was abused, she is afraid of most men, especially tall ones. she is spayed, any help?

i will soon be moving, and in the futur be traveling alot with this lab, i would like to train her in a way where she could hold it for 8 hours and give good signs when she needs to go.