Anyone use anti-fatigue foam mats to quiet Fastrack?

Those mats are usually thick and tough to cut. I believe the consensus on this forum was the roofing foam found in many box stores

I used foam carpet padding under my track. It costs $1 per square foot or even a little less. It's easy to cut, lay down and roll up. I used it for my permanent layout and while the trains aren't silent it reduced the noise significantly. Carpet padding covered by cheap carpet in the appropriate color would make a good base for a holiday layout.

I can't help with the mats you're asking about since I have never tried them. I don't know if they are designed to absorb sound like carpet padding is. I know carpet alone doesn't reduce the noise very much. I tried that before I tried the carped padding. On my layout I used the padding covered with Woodland Scenics Ready Grass mat for a finished look.

I hope this helps.

Not a bad idea. I have a few of those around in the basement. The price is right especially if they are on sale and you have a coupon.

What I am using on my current layout is roller rubber.  I purchased online from rubberflooring inc.  I am constrained on height so I only used 2mm thick product.  Thicker rolls could take a screw if you were so inclined.  Rubber wont slide as much on hardwood as felt will.

Rolled rubber is also cheaper per sq ft than anti-fatigue mats.  I cut mine with a sharp utility knife (1/4 inch used on floor) and scissors (2mm)

The best noise reduction for Fastrack is filling the cavity with some sound deadening material.  The empty space tends to act like a drum and amplify the sound.

I tested Woodland Scenics Trackbed. It is split in the center and fits well underneath the FasTrack. Cut it with scissors and attach with Gorilla glue. This worked, but in the end I decided to sell it off and convert to GarGraves.

If your layout is going to be on the floor, why couldn't you use an area rug or a decorative holiday blanket (points with wife?).

The area rug is usually round on the perimeter.

Hopefully you can find the correct 031, 036, 042, 054, and 072 curvatures on the corners.

Otherwise you could use a holiday decorative blanket.

A quilt has too many highs and lows.

You could fold/roll up the excess blanket on the curves and decorate the raised area as snow banks.  These will make nice cushy places for the occasional hi speed engine to land during time trials.

If either blanket or rug was dedicated to the holiday train layout you could punch small holes in it to allow the wires to run under the blanket/rug and hide them from view.