The "40" in the filename typically refers to the release version (v40) of this specific patch set. How to Use the File
The core "informative" or defining feature of this file is the implementation of that allows vehicles to use multiple lanes effectively on a single road. otrp40.rar
This specific patch is often integrated into or used alongside Simutrans-Extended , a version of the game focused on realism and complex mechanics like signaling and frequency-based demand. The "40" in the filename typically refers to