CVRP & VRPTW Fleet Optimization: Go ALNS Routing Engine
Answer-first: Combinatorial fleet routing at scale requires decoupling road-network distance calculation from vehicle assignment. By pairing an in-memory OSRM table engine with an Adaptive Large Neighborhood Search (ALNS) solver written in Go 1.24, engineering teams can solve Capacitated Vehicle Routing with Time Windows (VRPTW) for 500+ stops in under 800ms while eliminating 99% of third-party map API costs. Prerequisite: Familiarity with graph search algorithms (Dijkstra, Contraction Hierarchies), combinatorial heuristics (ALNS, Simulated Annealing), and Go memory layout optimization. ...