Gene,
Demonstrations against a Chinese company? Remember Tiennemen(sp?) Square?

Start by buying some of the pieces you will need.
One thing to do is to figure what minimum radius you will use for the equipment you will be running.
Buy some curves with the minimum radius you will use. You know that you will need at least enough to make two half circles. With an "E", you'll probably need enough for 4 half circles.
If you want easement curves (a good idea), that will be more complicated.
You know you will use straights, so buy some straights. You probably have a rough idea of how long your straight sections will be. Buy what you're sure you'll need to start with.
Start laying them out.
Then, it's easier to figure out what pieces you will need to fill in the gaps.

LD - Bachmann DOES still use traction tires on their old time 4-4-0's.

Seems like DST is meant to appease just a few.
Why don't the "9 to 5" companies just change their working hours in the summer and let the rest of us alone?
Is DST really relevant to those who work evening/midnight shifts? Or retirees?
I guess it means more sunlight for play after school, but school isn't in session in the summer anyway.

JWB
In the #1 pic, it creates an "S" turn. The more straight you have between opposing curves, the less chance of derailment with longer cars.

Some EZ Track sidings -
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Passing sidings
One problem with making a passing siding on the straights with EZT (EZ Track) is that (with one exception - #5 below) you need a 2" straight.
That is, unless you want to cut the EZ Track.
As of today, 2" straights aren't sold separately.
They are sold with Bachmann's 90* crossing. It comes with four 2" straights.
Below are 6 examples of how you can make a passing siding using 18" radius curves.
This won't work with 15" or 22" radius curves without some kind of "S" curve somewhere.
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1. Below -  No straights between curve and turnout.   ***NOT A GOOD IDEA ***
Diverging leg = left - 18"r - 18"r - right
Straight leg = left - 3" - 4 1/2" - 9" - "2 1/4" - 2" - 9 - right
Dimensions = 38 3/4" long   6 3/4" wide

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2. Below -  2" straights between curve and turnout. 
Diverging leg = left - 2" -18"r - 18"r - 2" - right
Straight leg = left - 9" - 2 1/4" - 2" - 2" - 9" - right
Dimensions = 42 1/4" long   7 3/4" wide

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3. Below -  2 1/4" straights between curve and turnout. 
Diverging leg = left - 2 1/4" -18"r - 18"r - 2 1/4" - right
Straight leg = left - 2" - 9" - 4 1/2" - 9" - right
Dimensions = 42 1/2" long   7 3/4" wide

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4. Below -  3" straights between curve and turnout. 
Diverging leg = left - 3" - 18"r - 18"r - 3" - right
Straight leg = left - 9" - 3" - 3" - 2" - 9" - right
Dimensions = 44" long   8 1/4" wide

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5. Below -  4 1/2" straights between curve and turnout.
*** The only combination that will work without a 2" straight. ***
Diverging leg = left - 4 1/2" - 18"r - 18"r - 4 1/2" - right
Straight leg = left - 9" - 3" - 3" - 2 1/4" - 2 1/4" - 9" - right
Dimensions = 48 1/2" long   9" wide

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6. Below -  9" straights between curve and turnout. 
Diverging leg = left - 9" - 18"r - 18"r - 9" - right
Straight leg = left - 9" - 9" - 2" - 4 1/2" - 2 1/4" - 9" - right
Dimensions = 54 1/2" long   11 1/4" wide

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7. Below - Opposing turnouts
Diverging leg = left - 2 1/4" - left - right - 2 1/4" - right
Straight leg = left - 4 1/2" - 3" - 2" - 9" - 9" - right
Dimensions = 45 1/2" long   7 3/4" wide

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   EZ Track yard
Here is an EZ Track yard made without cutting pieces and using the 2" straights, standard turnouts, and 18" curves.
The below pics use the diverging legs for the straight sections and the straight leg
for the curved sections.
Add straights equally between the two curves and the straights to make it longer.
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   1. Below - Can be passing siding or two track yard.
Diverging leg  = right - 9" - 2" - 2 1/4" - left
Straight leg = right - 18"r - 18"r - left
Dimensions = 34 1/2" long   10 1/2" wide (to lowest corner of turnout)

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   2. Below - Four track yard.
Top set of turnouts -
Diverging leg  = right - 9" - 2" - 2 1/4" - left
Straight leg = right - 18"r - 18"r - left
Second set of turnouts -
Diverging leg  = right - 9" - 9" - 2" - 9" - left
Third set of turnouts -
Diverging leg  = right - 9" - 9" - 4 1/2" - 2" - 2 1/4" - 9" - 9" - left
Dimensions = 65 1/4" long   17 1/4" wide (to lowest corner of turnout)

I thought it was pretty cool.
Reminded me of Back To The Future.

Pretty cool!

The first one didn't show up
1.

Here are a few EZ track layouts I came up with.  These were up on the old site.
One is the WGH layout using 22" radius curves.
I have some more pics of sidings I'll put up shortly.

The pieces that have the white strips across them are the 2" straights.
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[imghttp://www.sarget.com/trains/traintips/bach/eztrack/bachezyarda-24.jpg[/img]http://2.

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Buoy,
You can use small straight pieces in the smaller curves to make them a little bigger.

Derek,
I have the pictures, but I don't have the old posts.
I could post the layout pics again.

The diameter of 22" curves is 46" measured on the outside of the roadbed.

Hans in China,
Do you read this Bachmann board?
I replied to you about the LS domes on the "EB" site, but it wouldn't let me post an email address to buy them directly.
It's against EB's policy for them to let me buy directly from you.
In order to go through them, you have to put the domes up for sale through them so I can buy them.
I sure hope you read this board. It would make things much easier.

Buoy,
You're talking about HO right?
To go smaller, you only have 18" and 15" radius in EZ track.
Make a quarter of a circle with the 22" and the 18" curves. Put the 18" inside the 22" and move them until all 4 flat ends line up.  You can use a framing square if you have one.
That's how much distance apart you will have to have the straights to keep them parallel.
You can do the same with the 15" if you decide to go with that small of a radius.