关于S-Paramics 和 VISSIM

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关于S-Paramics 和 VISSIM   原文作者为 TRANBBS论坛SUIYUAN用户
下面为2003年伦敦交通署关于S-Paramics 和VISSIM的对比。（版本应分别为S-Paramics 2002，VISSIM 3.7）   
http://bbs.tranbbs.com/dispbbs.asp?boardid=18&ID=26871   

Microsimulation Modelling Guidance note for TfL, Transport for London, July 2003   
      伦敦交通署微观仿真模型指南。伦敦交通署，2003年7月，第16页   


6. S-Paramics vs VISSIM     

The availability of S-Paramics and VISSIM models for the Stockwell gyratory has offered an excellent opportunity to directly compare the two packages. The comparison shows that the packages are generally very similar and both require large amounts of input data. S-Paramics is more suited to bigger networks and motorways while VISSIM is more suited for detailed urban driving conditions. (Stockwell Cross is a major gyratory system situated between the A3 and A203 in Lambeth, South London).     



Stockwell 旋转（gyratory）交叉口（位于伦敦南部）同时使用了S-Paramics 和 VISSIM 模型，因此为直接比较这两种软件提供了很好的机会。结果表明，一般来讲，两个软件包很相似，二者都需要大量数据输入。S-Paramics更适合大地域的道路网络和高速公路，而VISSIM 更适合详细的市内行驶状况。S-Paramics 的数据输入和模型校正较快，污染排放模型更先进，以及模型输出结果更友好。VISSIM的路网改变较易，方案测试较快，动画和行人模型较好。二者的模型验证所需时间相似。  

下面为2006年英国高速公路局关于S-Paramics和VISSIM的陈述（版本分别为S-Paramics 2006.1，VISSIM 4.10）   
The micro-simulation software packages are still in an intensive development period and each developer, certainly for the main packages used in the UK (S-Paramics, Vissim, and Aimsun), are providing new releases on a regular basis. The competition to establish market share has driven development to meet user’s needs and each package is now extending the capabilities it contains to cover a wider area of application.   


Earlier versions of the individual packages showed weaknesses in certain areas. For examples, S-Paramics was initially designed with large network applications in mind but reservations were expressed by some users as to the more generic approach to the detailed behavior at junctions that existed and the lack of flexibility in parameter definition. In the case of Vissim, the degree of detail and flexibility of parameter definition at a junction level was considered by many to be a strength of the software but that this imposed a burden in developing large networks, as so many parameters needed defining. Each package has now moved some way to eradicating these issues as S-Paramics has extended the set of parameters that can be specified to control headway and gap acceptance at different junctions types, and Vissim now enables larger networks to be more readily coded as it enables generic junctions to be defined which can be enhanced by the user (Highways Agency, 2006).   

目前，S-Paramics和Vissim 均采取了一定的措施来改善先前版本的薄弱之处。S-Paramics 对可以修改的参数进行了扩展，以便控制不同类型交叉口处的车头时距和可接受间隙。而Vissim现在允许定义通用交叉口（用户可修改）比便能够较容易的标定较大路网。