[sumo-user] Issue with Taxi Disappearing After Custom Route Completion i

[Jay Patel <jayyyyp2416@xxxxxxxxx>]

We are currently working on a simulation involving taxis following custom routes in SUMO. However, we've encountered an issue: once the custom route is completed, the taxi disappears from the simulation—even if the passenger has not yet been picked up or dropped off. I have attached the function code for your reference, get_all_shortest_routes() will return list of list of all the possible shortest path from one edge to another.

Could you please advise on how this issue can be resolved? We would like the taxi to remain active in the simulation until the passenger is successfully dropped off, regardless of whether the custom route has ended.

Any guidance or recommendations would be greatly appreciated.

Thanks,

Jay

def controlled_routing_after_onboarding(taxi_id):
    """
    Update route of taxi based on attractiveness-controlled routing
    allowing max 2 diversions from shortest paths.
    """
    global taxi_destinations, taxi_diversions, taxi_paths, taxi_actual_route

    if taxi_id not in taxi_destinations or taxi_id not in taxi_paths:
        return

    current_edge = traci.vehicle.getRoadID(taxi_id)
    dest_edge = taxi_destinations[taxi_id]
    
    if current_edge == dest_edge:
        return

    if taxi_id not in taxi_actual_route:
        taxi_actual_route[taxi_id] = [current_edge]
    else:
        if taxi_actual_route[taxi_id][-1] != current_edge:
            taxi_actual_route[taxi_id].append(current_edge)

    # Avoid modifying route if max diversions reached
    if taxi_diversions.get(taxi_id, 0) >= 2:
        return

    # Next edge from attractiveness logic
    next_edge = decide_next_edge(taxi_id, net, attractiveness_map)
    if not next_edge:
        return

    # Check if next_edge is valid continuation
    try:
        # Confirm connection
        path = net.getShortestPath(net.getEdge(current_edge), net.getEdge(next_edge))[0]
    except Exception:
        print(f"[Skip] {current_edge} to {next_edge} is not connected. Skipping reroute.")
        return

    # Validate against shortest paths
    shortest_routes = taxi_paths[taxi_id]
    valid = False
    for r in shortest_routes:
        if current_edge in r:
            idx = r.index(current_edge)
            if idx + 1 < len(r) and r[idx + 1] == next_edge:
                valid = True
                break

    if not valid:
        taxi_diversions[taxi_id] = taxi_diversions.get(taxi_id, 0) + 1
        print(f"[Diversion] Taxi {taxi_id} diverted to {next_edge}. Diversions: {taxi_diversions[taxi_id]}")
        # Recalculate shortest paths from new position
        new_paths = get_all_shortest_routes("grid.net.xml", next_edge, dest_edge)
        if new_paths:
            taxi_paths[taxi_id] = new_paths

    # Update route (prepend current route with new edge)
    new_route = [current_edge, next_edge]
    print(new_route)
    traci.vehicle.setRoute(taxi_id, new_route)