Lyric discussion by SaintJim 

Cover art for The Only Road lyrics by Dropkick Murphys

I think the pivotal line here is "Now climb aboard the red line train that's headed out of town Or stick around and just relive your past". Basically, the song reads as an arguement (either with one's self, or with someone else) about whether to stay where it's safe and comfortable or to break out and risk losing everything for a chance to actually do something with your life.