Track Spacing Guide

I had a friend who was helping lay track one weekend make a wooden spacers(to cold for me to go out in my shop) on a 4.5 center based on the Ross double cross over and I just lay them across the track ever few feet to maintain consistent spacing. 

I used one when making my layout using Atlas track, they work quite well.

 Here's a link to some examples. I think there might be a couple more examples in this thread as well.

I guess the question is what are you looking for, a table that tells you what combinations of straight track pieces you need to put together to get a length of track, or distances between parallel tracks.  Atlas track is made for 4.5" center to center parallel tracks, which you get with O54, #5 and #7 turnouts put back to back.  All other turnouts will give you more or less, but I don't remember which does what anymore.  On my layout to keep trains on the inside loops from hitting trains on the outside loops I made track spacing at about 5.25" center to center, but I am also using tighter radius track.  If you want to make sure you never have run-ins on the curves, I'd go with Lionel's 6" spacing, but that does mean for the most part you will be cutting custom lengths to go between turnouts.

I have not come across a table that  gives combinations of straight track for lengths for Atlas track, only Lionel FasTrack.