Car-Following Function, Lane-Changing Function, and Cellular Space Definition Function

In this document, we can extend the content by adding the following features:

- Car-following function: This feature enables vehicles to maintain a safe distance from the preceding vehicle to ensure driver safety. Implementation typically involves algorithms like the Intelligent Driver Model (IDM) which calculates acceleration based on relative velocity and distance gaps.

- Lane-changing function: This functionality allows vehicles to switch lanes when necessary to better adapt to traffic conditions. The implementation often uses utility-based decision models or gap acceptance algorithms to evaluate lane change opportunities.

- Cellular space definition function: This feature defines vehicle spatial positions on roads to facilitate traffic planning and management. It typically involves dividing roads into discrete cells (cellular automata approach) where each cell can contain at most one vehicle.

- Vehicle definition function: This functionality defines different vehicle types for specialized traffic control and management. The implementation may include object-oriented programming with vehicle classes having attributes like length, maximum speed, and acceleration capabilities.

- Driver characteristics definition function: This feature defines driver traits and behaviors to better understand and predict driving patterns. Implementation can incorporate psychological models and parameter distributions for aggressiveness, reaction time, and risk tolerance.

- Departure density definition function: This functionality defines vehicle departure density on roads to better control traffic flow. The implementation typically uses Poisson processes or time-headway distributions to model vehicle generation rates.

- Signal timing definition function: This feature defines traffic signal timing plans to optimize traffic flow and efficiency. Implementation involves algorithms for calculating optimal green phase durations, cycle times, and offset coordination between intersections.

- Lane-changing ratio definition function: This functionality defines the proportion of lane-changing vehicles versus non-changing vehicles to improve traffic control and road capacity utilization. Implementation often uses probabilistic models or decision thresholds based on traffic density differentials.