is a compressed archive containing a specific version of OTRP (One-way Two-way Road Patch) , a popular modification for the open-source transport simulation game Simutrans . Primary Informative Feature: Two-Lane Road Mechanics
Faster vehicles can pass slower ones (like trucks or buses) on two-lane roads.
The "40" in the filename typically refers to the release version (v40) of this specific patch set. How to Use the File
Effectively doubling or quadrupling the throughput of your road networks by utilizing all available visual lanes.
In standard Simutrans, vehicles typically use only one lane even on multi-lane roads. The OTRP patch provides:
Place the executable ( simutrans.exe ) and any included library files into your existing Simutrans installation folder.
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.
Vehicles select lanes based on their speed and upcoming turns. Context and Origin OTRP Meaning: It stands for O ne-way T wo-way R oad P atch.