Track Plans
What Track to Use?
There are a few different brands of track that can be used to make portable layouts. To make portable layouts, you need a track with a roadbed and the ability to "snap" together.
I looked at Life-Like Power-Loc track (which is now Walthers Power-Loc), Kato Unitrack, Atlas Tru-Track, and Bachmann EZ Track. Comparing these, I thought Bachmann was the best of the brands. It had the most types of switches, curves, and straight pieces compared to the others. Also, I had some Bachmann track already, so I could just add to it. Over the years, I would buy a few pieces whenever I needed to add or make something new, so eventually I wound up having a nice collection.
And another thing is that Bachmann has DCC controlled switches. These are great if you're running DCC because the switches don't use wires and are very clean looking as a result. To operate the switch, it is controlled by the "accy" or accessory option on your handset. And you can program routes to control multiple switches so that they all switch at the same time for a route. So now I just buy the DCC switches when I'm buying a switch.
The following is my current inventory.
Curved Sections
18" radius, 30 deg - 21
18" radius, 15 deg - 4
18" radius, 10 deg - 4
22" radius, 22.5 deg - 19
22" radius, 11.25 deg - 4
26" radius, 18 deg - 5
33.25" radius, 18 deg - 5
33.25" radius, 6 deg - 4
35.5" radius, 18 deg - 5
Switches
Turnouts
RH DCC - 3
LH DCC - 1
RH #5 - 1
LH #5 - 1
LH #5 DCC - 1
Wye #5 - 2
Crossovers
Left crossover - 1
Right crossover - 1
All the Rest
Straight Sections
9" - 25
3" - 8
2.25" - 9
Crossings
30 degree - 1
45 degree - 1
Various
Bumpers - 4
4x8 Track Plans
There are a lot of really good track plans out there, some in books, some in magazines, others on the internet. But to narrow it down to only track plans that fit on a 4x8 train table, the list is much smaller. It's hard to fit a nice layout on a 4x8 table.
I looked at many track plans out there, and put together a list of the best layouts that I have seen. And for each layout, I did a SCARM track plan using Bachmann EZ Track.
Timesaver
The Timesaver track plan by John Allen using Bachmann track (top) and Atlas track (bottom). A lot has been written about the Timesaver as a switching puzzle game to play.
Micro Timesaver
The Micro Timesaver track plan is similar to the Timesaver and about the same size, but it uses regular left/right switches instead of the #4 Bachmann switches.
Dusty's Layout
This track plan has several types of industry for good switching fun. Dusty posted lots of photos here on the Model Railroad Forum, showing what the finished layout looks like. This layout and others are at the SCARM website.
Mike's Small Track Plans
Mike's website has a bunch of HO layouts that fit on either a 36"x78" door or a 4x4 table. He designed using Atlas track, but you can modify them to use Bachmann. There are a lot of interesting layouts, and with each he describes the operation.
Crazy Model Trains
Crazy Model Trains has a bunch of layouts using Bachmann EZ track that you can buy, and many fit on a 4x8 sheet of plywood. There are no SCARM files, but just layout images.
Track Plans I Made Up
Because I have three passenger train sets - the Surfliner, Coaster, and Super Chief - that have cars requiring curves with radius of 22 inches or larger, I needed a track plan that would handle those trains. Plus I wanted to be able to run two trains if possible, and have a yard and one or two spurs. So lots of requirements. All had to fit on an 8x4 train table.
Trainyard Loop
Railyard can handle switcher locomotive. Big 22" curves for the large passenger trains. Passing siding for two trains.
Yard and Spur Loop
Two independent loops for more action. Can handle trains requiring 22" curves.
Yard and Two Spurs
Two loops with two spurs and a yard. Outside loop has 22" curves.
My Original Layout
Here's my old original layout. It's possible to park a passenger train on the inside loop to pick up passengers while a freight train is going around the outside loop. Not 22" though. But be careful where they cross!
Twice Around 45
Twice Around Yard
Three Times Around
Waterlevel Western
I based this on the Atlas track plan of the Waterlevel Western which you can see on this YouTube video. They also sell the entire track kit in Atlas track, but this plan is for the Bachmann EZ track system and is a tiny bit different.