Part 1: Core Routing Algorithms — A* & Dijkstra Visualized
Prerequisite: This part builds on the concepts introduced in the Executive Summary. Part 1: Core Routing Algorithms — A* & Dijkstra Visualized Executive Summary & Quick Answer: A* pathfinding uses Euclidean heuristics to accelerate 1-to-1 point routing, whereas Single-Source Dijkstra is mathematically superior for 1-to-N distance matrix calculations because it builds a single shortest-path search tree to all reachable destinations in one pass. Key Takeaways: Matrix Efficiency: Dijkstra expands radial wavefronts in a single pass, computing 1-to-N driver matrices 10x faster than running N independent A* searches. Turn Restrictions: Edge-based graph representation models turn penalties (e.g. prohibited U-turns) by representing turns as edges between directed road segments. Shortcut Hierarchies: Contraction Hierarchies contract local nodes offline, reducing real-time search space by orders of magnitude. What You’ll Learn That AI Won’t Tell You: ...