I'm pretty sure you can apply at other locations, just not at the location you were selected as an alternate for. They keep your record on file, and if someone doesn't make it through or they open up more positions, then you will get a call. I was selected as an alternate at the beginning of October and received a conditional offer of employment a week ago. More than likely you will get an offer, hang in there and check your emails daily.
Whats up buddy,
I was also considered as an alternate. They will call but it maybe up to six months. Basically we have been selected. But remember since we went through the interview process we cannot apply to any other conductor position in any locations within the company for six months. You many apply to a different craft now.