If planning a trip that involves two routes, how many hours minimum do you consider "safe" to not worry about a late arrival meaning you miss your connecting train? For example, if I took the Capital Ltd from DC to Chicago, with an expected arrival time of 8:45 am, and planned on catching the Southwest Chief that afternoon, with an expected departure time of 2:50 pm, would that be a reasonably safe bet? Or do you think it's best to have even more hours between trains?