duaIterate是否仅在插入新车辆时分配路线，而不是在插入所有正在行驶的车辆时分配路线？

Question

在查看duaIterate.py中的代码时，我推测duaRouter仅根据行程文件考虑插入新的车辆。尽管交通状况动态，但已经在网络中运行的其他车辆的路线并未更新。

    if options.trips:
        input_demands = options.trips.split(",") 
        initial_type = "trip"
    elif options.flows:
        input_demands = options.flows.split(",")
        initial_type = "flow"
    else:
        input_demands = options.routes.split(",")
        initial_type = "route"
for step in range(options.firstStep, options.lastStep): 
        btimeA = datetime.now()
        print("> Executing step %s" % step)

        router_demands = input_demands
        simulation_demands = input_demands
        # demand files have regular names based on the basename and the step
        if not (options.skipFirstRouting and step == 0):
            simulation_demands = [
                get_basename(f) + "_%03i.rou%s" % (step, routesSuffix) for f in input_demands]
        if not ((options.skipFirstRouting and step == 1) or step == 0):
            router_demands = [get_basename(
                f) + "_%03i.rou.alt%s" % (step - 1, routesSuffix) for f in input_demands]

        if not (options.skipFirstRouting and step == options.firstStep):
            # call duarouter 
            # 66, see how the duarouter works from here  
            for router_input, output in zip(router_demands, simulation_demands): # a list of tuple
                print(">> Running router on %s" % router_input) #66, see that router_input are used for re-routing
                btime = datetime.now()
                print(">>> Begin time: %s" % btime)
                cfgname = writeRouteConf(duaBinary, step, options, dua_args, router_input,
                                         output, options.routefile, initial_type) 
                #66 this is to generate the cfg file for duarouter
                log.flush()
                sys.stdout.flush()
                call([duaBinary, "-c", cfgname], log) 

上面的代码似乎告诉我们，input_demand来自行程文件。并进一步用作router_demand和Simulation_demand。

我希望SUMO每一步都应检索网络中当前的所有车辆，并从行程文件中插入车辆。我们应该考虑不同边缘的实时权重，路由选择，并为其应用最短路径算法。

我是对的吗？抱歉，如果我误解了代码。