First, let's look at Lanes.
First off, 'there are no rules' of how to lay down the lanes. I won't even say this laydown is 'typical'. Remember I've only seen adult LTS. However, Basic 1 seems to get a whole lane to its self because that's where the most students are. Then the laydow of 3,4,5 and 6 get made based on how many students are in the class. If 2 has 5 people and 5-6 had 7,people, then they may get squished into the same lane with different coaches, while a Basic 3-4 with 12 people in it may get its own lane. The only 'rule' I've seen is that the Basic 1 is always at the opposite end of the rink from Freestyle. And every rink I've done Adult LTS always had a kids Freestyle on the Adult LTS ice.
Also, if you look in the center, you might have a freestyle and a Pre-free, or a heavily populated Basic 5-6. The laydowns seem to all be based on class size.
Why if so much of the LTS curriculum requiring skills on the circle, do some rinks use lanes?
Rinks with LTS in circles.
Technically, the ice is divided into patches, usually with a circle in it. Here's an example. Every class seems to get the same space. The little trick with circles is in the center ice, I've seen like an extra (third) class crammed in there--this has happened to me. Again, the division of classes depends on how many sign up for that class.
Basic 1 and 2 need lanes. Everybody else needs circles. A full set of classes can use lanes and circles together. And, in real life you can have patches of ice overlap. If Freestyle classes overlap Basic skills classes a little, one expects to have the freestyle skaters avoid the lower level skaters.
And finally, no matter the best laid plans of the skating director, once the coaches get on the ice, there's a lot horse trading for space. And sometimes the skating director forgets to assign space to an entire class. This has happened to me not once, but twice!
Where do I get to Skate?