City Traffic Pro

Introduction to Professional Traffic Simulation

City Traffic Pro is a complete, flexible, and performance-optimized traffic AI system for Unreal Engine 5. This tool allows developers to simulate realistic vehicle movement on roads, intersections, and highways. Consequently, it is an ideal solution for those creating open-world games, cinematic sequences, or detailed traffic simulations. The system provides fine-grained control over car AI, flow density, and overall vehicle management.

Realistic and Scalable Traffic Systems

With City Traffic Pro, you can populate any city, town, or highway with vehicles that follow spline-based roads. These vehicles exhibit dynamic behaviors such as lane switching, yielding, and honking. Moreover, they maintain appropriate road speeds while remaining cautious of red lights and other vehicles. Therefore, the simulation feels authentic and responsive to the environment.

Multi-Lane Roads and Complex Intersections

The developer has included built-in blueprints to help you build complex road networks easily. You can create various types of intersections, including signalized, mid-block, all-way stop, priority, and roundabouts. Additionally, the traffic lights are fully customizable. They support both European and American styles along with specific light sequences to match your project's setting.

Advanced Traffic Flow Control

City Traffic Pro features specialized blueprints like BP_Change_Lane and BP_Road_Switcher. These tools allow you to guide specific or random cars between lanes or trigger merges at highway entries. Each control supports probability settings, delays, and directional rules. Furthermore, the system includes a parking and stop control system. This allows vehicles to drive into parking lots, stop temporarily, and later leave dynamically.

Performance-Driven Spawning and Management

To ensure high performance, the BP_Vehicle_Manager handles spawning, teleporting, and recycling vehicles around the player. This maintains a consistent traffic flow without causing performance drops. You can also set specific spawn densities and adjust traffic levels for night-time scenarios. Consequently, the system is designed to support hundreds of vehicles simultaneously through optimized blueprints and functions.

Comprehensive Asset Library and Tools

City Traffic Pro comes packed with essential assets to jumpstart your development. The package includes:

• 12 fully drivable cars with brake lights, blinkers, and engine sounds.
• 12 static car meshes for efficient parking population.
• 74 popular road signs from North America and Europe.
• A day-night cycle blueprint that controls streetlights and traffic density.
• Extensive debug tools to visualize spline speeds and steering targets.

In addition, the package includes "Road Creator Minimal," a set of blueprints for building various road types. It also features a demo level with three pre-built cities showcasing European, American, and British traffic layouts.

Technical Integration

City Traffic Pro integrates seamlessly with other tools like Road Creator Pro and spline-based landscape roads. However, users must ensure the ChaosVehicle Plugin is enabled within Unreal Engine 5 to avoid errors. For obstacle avoidance, vehicles use line traces to detect other cars and static objects. This system includes configurable aggressiveness and stuck vehicle recovery to keep traffic moving smoothly.

Final Take

City Traffic Pro offers a robust and scalable solution for anyone needing high-quality traffic AI in Unreal Engine 5. By combining realistic AI behaviors with performance-optimized management tools, it provides everything needed to create a living, breathing city environment. Whether you are building a small neighborhood or a sprawling metropolis, this system ensures your roads remain active and realistic.

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