4.2.11 Roadway Modeling Techniques

The WWSL

The WWSL Maintenance Of Way department has identified five types of roadbed based on traffic usage. They are: main line, branch line, yard, industrial lead or spur, and storage track. The degree of maintenance (roadbed, ballast, tie and rail usage)for those five types plus some non-use types result in thirteen different possibilities for modeling purposes. Add in the prototype Northern Pacific Branch Line and the Milwaukee Road / Union Pacific Branch Line Roadways you have fifteen possibilities.

They are:

High Profile Roadway (Class A) - high profile roadway, stone ballast, ties and rail are new or between x and y years. See 4.2.11.1  Modeling Technique for High Profile Roadway for details.

Medium Profile Roadway (Class B) - medium profile roadway, stone or gravel ballast, ties and rail are between x and y years old.See 4.2.11.2  Modeling Technique for Medium Profile Roadway for details.

Low Profile Roadway (Class C) - low profile standard roadway, cinder or dirt ballast, ties and rail are between x and y years old. See  4.2.11.3  Modeling Technique for Low Profile Roadway for details.

Medium Profile Yard track - medium profile roadway, stone ballast, ties and rail are new or between x and y years. See 4.2.11.4 Modeling Technique for Medium Profile Yard Track for details.

Low Profile Yard track - low profile roadway, cinder and dirt ballast, ties and rail are between x and y years old. See 4.2.11.5 Modeling Technique for Low Profile Yard Track for details.

Non-Profile Yard track  - non-profiled roadway, dirt ballast, ties and rail are between x and y years old. See 4.2.11.6 Modeling Technique for No Profile Yard Track for details.

Industrial Lead or Spur Track - non-profiled roadway, dirt ballast, ties and rail are variable age based on age of installation. See 4.2.11.7 Modeling Technique for Industrial Lead or Spur Track for details.

Storage Track. Non-profiled roadway, dirt ballast, ties and rail are variable age based on age of installation. See 4.2.11.8  Modeling Technique for Storage Track for details

Retired roadbed.  Any profile roadway, aged ties in ballast of any type, overgrown weeds, rusted rails are either spiked or unspiked and lying on ties in preparation for removal. See 4.2.11.9  Modeling Technique for Retired Roadbed for details.

Decrepit roadbed. Ties remain in dirt and weeds but rails are either spiked without benefit of tie plates or unspiked and lying on ties in preparation for removal. See 4.2.11.10 Modeling Technique for Decrepit Roadbed for details.

Abandoned roadbed. Ties are barely visible in the dirt and weeds, rail is gone. See 4.2.11.11  Modeling Technique for Abandoned Roadbed for details.

Dismantled roadbed. Ballast of any type, but rail and ties have been removed. See 4.2.11.12  Modeling Technique for Dismantled Roadbed for details.

Removed roadbed. Ballast was excavated down to the bare earth, roadway may still be visible and used by back road vehicles or by walking. See 4.2.11.13  Modeling Technique for Removed Roadbed for details.

Northern Pacific Branch Line. See 4.2.11.14 Modeling Technique for Northern Pacific Branch Line for details.

Union Pacific Branch Line. See 4.2.11.15 Modeling Technique for Union Pacific Branch Line for details. 

I will update the appropriate modeling technique as I build that track segment.

Reference


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