There are so many proving ground sites for testing CAV, such as MCity, Gomento, ACM, SwRI in U.S and Asta Zero in Sweden etc. At the same time, some are on building. But which one is the best? Or What is the criteria to evaluate these test sites? Once the senarios are fixed in a site, how to guaratee the sustainability of the site. What's more, in a fixed test route, does the sequence which the senarios enmerge affect the evaluation performance? So how to distribute the testing senarios and facilities in a proving ground?