Are specifications available for track. Especially length, curve start points, and such for crossovers.?
bperson
9" straights are just that 9 inches. The standard turnout is also 9". The #4 and #5 turnouts are 11.5". The #6 crossover is 21" and is just two #6's joined together to make one.
I use anyrail.com to design my layout and upgrades. There is a free trial version you can download and play with up to 50 pieces, any more and you have to purchase the whole version for about $50.
Jerry