Hobbies And Interests
Loop
The loop of track that comes with a train set is the starting point for this type of track plan. With a variation on the simple loop, modelers can run trains continuously to simulate mainline operation. Two or three parallel loops allow simultaneous running of multiple trains and a "big time" mainline railroading atmosphere, even in a 4-by-6-foot space.
Figure-Eight and Folded Dogbone
You can add interest to a simple layout by twisting what is essentially a loop into figure-eights and dogbones. A dogbone pinches the center of the loop to create parallel trackage that resembles a double-track line, allowing a long run before the train enters the tight loop at either end to repeat its route. If the return loops are relocated so both occupy the same end, a "folded dogbone" results. In a figure-eight, the loop's track intersects at either a central crossing or passes over and under via a "flyover" bridge.
Point-to-Point
The point-to-point style of layout best approximates what real railroads do. In this plan, the track follows a course between two endpoints. When the train reaches one end or the other, it must stop, be taken apart and reversed in some manner (such as using yards, runaround sidings, turntables or triangular "wye" tracks). The point-to-point is fine for modelers who enjoy planning and executing intricate moves, but exasperating for those who simply enjoy watching trains roll. It is also unsuitable for a small layout, since the train reaches its destination far too quickly. In HO scale, you need a space of at least 2 by 10 feet or you might consider a shelf-type layout on multiple walls.
Out-and-Back
This plan (sometimes called "point-to-loop"), a combination of the loop and the point-to-point, is a good way to enjoy switching along with some mainline running. One end of the out-and-back is a dead-end yard or siding, the other a return loop that can be concealed inside a tunnel to give the illusion of a train continuing on to a distant terminal.
Switching Layout
HO scale modelers with tight space limitations might consider a switching layout that fits on a 1-by-10-foot shelf. The most common shelf layout simulates part of a yard or port, with tightly arranged tracks, multiple crossings and switches, few curves and small buildings. This type of layout is limited to short locomotives with two or three cars.
Multiple Levels
Some ambitious modelers have designed and built multilevel layouts. Typically wrapping around the walls of a room rather than a central table, multilevel layouts can make for lengthy continuous runs. The supporting structure for such a layout, including helixes to move trains between levels, requires some skill in carpentry.
Staging Areas
One way to create the illusion of a model railroad that's larger than it appears is to use hidden "staging" tracks on which trains are held out of sight while others run. Multiple staging tracks allow for the use of many trains on a simple layout. Some modelers manage to run "blind" in and out of staging areas, but it takes experience and skill to avoid collisions and wrecks, often in inaccessible places.