Mod «Better Vehicle Dynamics» for Project Zomboid

This mod overhauls vehicle drivetrain and traction mechanics for Project Zomboid Build 42. It introduces a torque-curve driven engine, surface- and weather-aware grip, and optional realism systems that are sandbox-tunable and multiplayer-safe.

• Torque-curve acceleration: engines pull from a real power curve
• Surface & weather grip: independent traction on sealed road, rain, snow, and off-road
• Tyre-type grip model: worn, standard, and modern tyres have distinct grip per surface
• Load affects handling: heavily loaded vehicles are slower to accelerate
• Load affects fuel: hauling heavy cargo increases fuel consumption
• Configurable drag: separate tunable knobs for air drag and rolling resistance
• Reference power & weight (opt-in): researched HP/mass figures for vanilla and modded vehicles
• Cargo-capacity rescale: per-body-type storage multipliers
• Drift mode (opt-in): bindable key to break rear traction for arcade sliding
• Tyre marks: ground decals appear when tyres lose traction and fade over time
• Vehicle info panel: docked readout showing active profile, grip, tyre type, and cargo load
• Ground-clip guard: server-side safety net to prevent vehicles from sinking into the ground

All settings are exposed in Sandbox Options under Handling, Tyres & Load, Drivetrain, and Readout & Misc pages. Defaults aim for a grounded feel but can be adjusted toward arcade or hardcore styles.

Installation:

• Subscribe to the mod on Steam Workshop
• Navigate to the mod folder:

  Steam\steamapps\workshop\content\108600\3728775267\mods\BetterVehicleDynamics\B42.18_Manual_Install\

• Copy the zombie sub-folder into your Project Zomboid install directory (right-click Project Zomboid in Steam → Manage → Browse local files)
• Restart Project Zomboid
• Recopy the zombie folder after any Project Zomboid game update

Dedicated Server Installation:

• Copy the entire zombie sub-folder from

  B42.18_Manual_Install\

  into the server's

  <server>/java/zombie/

  directory
• Ensure both the server and all connecting clients have performed the manual install to prevent packet desync warnings

Compatibility:

• Works alongside vehicle-skin and content mods
• Run only one vehicle-physics overhaul mod at a time
• Requires Build 42.18+

Technical Information:

• Workshop ID: 3728775267
• Mod ID: BetterVehicleDynamics