Abstract: Tourism transport system is the determinant of tourist destination and its market, it is the basis for optimizing distribution of scenic spots. Accessibility is a potent index and is often used to evaluate the potential ability of region development. Currently, grading approaches of accessibility have been widely used, among them, cumulative time cost grid is most widely used for its intuition and brevity in a practical application. However, the variables of cost function in cumulative time cost grid is too single to reflect the actual accessibility of survey region. To improve the traditional algorithm, a new algorithm has been proposed on the basis of Link Performance Function. In the new algorithm, transportation fees and the actual accessibility was incorporated into the cost function, which has higher reliability to reflect the actual accessibility of survey region. Taking 123 of 3A scenic spots in Xinjiang as the research objects, this article analyzed the spatial distribution of the actual accessibility and compared the two algorithms from the perspective of accessibility. Results shows that new algorithm has higher reliability than traditional algorithm, and it has stronger correlation with the density of road networks than the traditional measurement. The patterns of spatial distribution of accessibility changed from symmetrical triangle to stair-step shape from southeast to northwest of Xinjiang.

Key words: link performance function, tourism transport, accessibility, Xinjiang