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我正在使用以下脚本在 PTV Vissim 的交叉口从链路 1 和链路 3 获取所有车辆对象。

def main():
TimeDiff = 1
DistLimit=200.00
SpeedLimit=47.00
DesiredSpeed=50


#Get All the vehicle objects on link 1 and 3.
Vehicles1=  Vissim.Net.Links.ItemByKey(1).Vehs.GetAll()
Vehicles3=  Vissim.Net.Links.ItemByKey(3).Vehs.GetAll()

#Iterate through every vehicle in link 1.
for Vehicles1 in Vehicles1:

    #Get attribute vehicle. (Atime1 = Arrival Time of Vehicle at Intersection)
    ArrTime=Vehicles1.AttValue("ATime1")
    DesSpeed = Vehicles1.AttValue("DesSpeed")
    Current_Speed1=Vehicles1.AttValue("Speed")


#Check if there any Vehicles on link 3.
if len(Vehicles3)>0:
#Iterate through every vehicle in link 3.
 for Vehicles3 in Vehicles2:
    #Get attribute of vehicles on link 3. (Atime3 = Arrival Time of Vehicle at Intersection
       ArrTime3=Vehicles3.AttValue("ATime3")
       DesSpeed = Vehicles3.AttValue("DesSpeed")
       DistSigHead2=Vehicles3.AttValue("DistanceToSigHead")
       OrgDesSpeed = Vehicles3.AttValue("OrgDesSpeed")

       if (ArrTime2-ArrTime)<TimeDiff:
        Current_Speed1=Vehicles3.AttValue("Speed")
        newDesSpeed=Current_Speed1-2
        Vehicles3.SetAttValue("DesSpeed", newDesSpeed)
        if DistSigHead2 ==0:
            Vehicles3.SetAttValue("DesSpeed", DesiredSpeed)

该脚本能够获取所有车辆对象并执行给定条件。但是 for 循环只会在车辆进入链路 1 或 3 时检查一次，并将其属性与另一链路上的车辆进行比较。我想检查链接 1 和 3 中每个时间步的每辆车，并比较到达时间。我想我没有正确应用 for 循环。任何人，请在这方面给我一些建议。

我们将非常感谢您在这方面的帮助和指导。谢谢。

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1 回答 1

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这行看起来逻辑上是错误的，虽然它不会产生错误：

对于 Vehicles1 中的 Vehicles1：

现在，重新编写脚本，如下所示：

旧脚本：

遍历链接 1 中的每辆车。

#OLD SCRIPT
for Vehicles1 in Vehicles1:
    #Get attribute vehicle. (Atime1 = Arrival Time of Vehicle at Intersection)
    ArrTime=Vehicles1.AttValue("ATime1")
    DesSpeed = Vehicles1.AttValue("DesSpeed")
    Current_Speed1=Vehicles1.AttValue("Speed")

#NEW SCRIPT:
for Vehicles1b in Vehicles1:
    #Get attribute vehicle. (Atime1 = Arrival Time of Vehicle at Intersection)
    ArrTime=Vehicles1b.AttValue("ATime1")
    DesSpeed = Vehicles1b.AttValue("DesSpeed")
    Current_Speed1=Vehicles1b.AttValue("Speed")```
于 2019-10-30T19:08:07.387 回答