Open the .rwp file using an archive tool like 7-Zip or WinRAR.

The .rwp file format is a standard package format for Train Simulator. To install , you can use one of the following methods: Utilities.exe (Official Method):

Navigate to your Train Simulator installation folder (usually Steam\steamapps\common\RailWorks ). Open and select the Package Manager tab.

How to install a .RWP file you downloaded - Railworks America

The route features a mix of double-track electrified mainlines (approx. 100 km), double-track secondary lines, and single-track diesel lines.