Roadbed
First, choose the type of roadbed you want. You can skip this part if you wish, but most modelers prefer the sound deadening qualities and the realistic appearance that roadbed provides.
Roadbed under the track such as cork or spongy material that is sticky on both sides will cut down on noise.
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Lay your track very carefully, kinks and tight curves will not be fun later. Only if you want to crash your trains ...
Roadbed: the built up "earth" upon which track is laid. In the modeler's world, we usually use cork or foam roadbed which is commercially available in hobby stores for this purpose.
Roadbed:
I would be remiss if I omitted some discussion of roadbed. This is what real track and ties sit on. First class railroads spend a lot of time keeping it in shape on the mainline. Smaller roads, yards and branches do not get as much care.
Roadbed--The part of the layout just below the track.
Scratchbuilding--Building models "from scratch" using an assortment of materials including wood, styrene and metal.
Roadbed: Foundation of built-up earth under tracks.
Rolling stock: Freight and passenger cars.
Running board: Walkway along roof or along sides of tank cars.
Roadbed is a big thing with many O gaugers. Some just tack it down, others paint it, and others add ballast. You can take a half measure, painting it gray and then spraying it with gray Plasti-kote Fleck Stone paint. That will tide you over.
Roadbed built up above the surrounding terrain to maintain a relatively even grade.
Fixed cab
A cab or throttle permanently mounted to one location.
Roadbed
On real railroads, the foundation layer of earth on which the track is built.
Roadmaster ...
Roadbed. The finished surface of roadway upon which track and ballast rest.
Roadbed shoulder. The portion of subgrade lying between the ballast-covered portion and the ditch in cuts, and the top of slope on embankments.
Roadbed
The surface upon which track is laid. This surface is usually raised above ground level by rocks topped with wooden or concrete ties, upon which the tracks are laid and then ballasted.
Rolling Stock ...
Sub roadbed attached to a riser.
John Armstrong I am not, so I won’t bore you with what I think are acceptable track planning practices, which in all reality I would probably just be making up.
I used AMI instant roadbed on my layout. If you use instant roadbed, use a little less water in the glue mix.
(Note - The term "Grade" is sometimes used to designate the finished roadbed, but such use conflicts with the meaning of "Grade" as given above and it should not be so used.) Grade Crossing A crossing of the track at grade (or street) level ...
Is cork roadbed any good for Tinplate? I used it on a small Super-O layout and there was no noticeable reduction in noise. This is because well secured tinplate track transfers vibrations right through the mounting screws into the benchwork.
Usually, used to spot surface a track when the roadbed is frozen and the ties cannot be surfaced tamped; or for temporary use to bring the tops of adjoining rails of different height to a desired plane or elevation.
Shoulder, ballast.
Date Nail A small nail used by railroads from late 1800's to present used to mark the year a tie was placed in roadbed. Nails are distinctive in that each has the last two digits of placement year stamped in head.
Ballast - Usually gravel, cinders, or crushed rock placed between ties and around track and roadbed to help prevent the track from moving, spread load, provide bearing for ties and track, and to drain water and help control weed growth.
040 (forty thousands) inches high and is manually affixed to the roadbed by solder to copper clad ties placed every 5th tie.
I used Homosote for a roadbed for all my track. It was cut 2 3/4" wide. There's about a half inch of subroadbed material extending out beyond the roadbed for the linings to rest upon.
Tack the joined track sections down on the roadbed, making sure there are no bumps in the roadbed, especially at the joint. A heaved joint can cause a derailment.
Process of maintaining roadbed (rail, ties, ballast, bridges, etc.). These materials are hauled in special maintenance of way cars, which also include cars that are equipped with heavy equipment, such as cranes and tie replacing machines.
Manifest ...
Selected material (gravel, slag or other heavy material) placed on the roadbed to hold track in line. Ballast preferably consists of hard particles easily handled in tamping, which distribute the load, drain well, and resist plant growth.
Ballast Car ...
As I mentioned earlier, I planned for my ballast profile as I was laying the sub roadbed. My module has a double mainline so it should reflect good drainage as would the prototype.
The phototransistors are mounted between the rails and through the roadbed. The groups for each track are connected in series as shown in the schematic.
Loose pieces of heavy stone or masonry used in some places to protect roadbeds from water erosion.
Rip-Track ...
A heavier rail can carry heavier loads with less distortion and less damage to the rails themselves and the roadbed.
 See also: Track, Locomotive, Train, Switch, Engine
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