By using the RapidEye images of the Xianxun Highway in 2010 and 2011, two monitoring indices, the vegetation area
and the vegetation coverage along the roadsides of highway, were estimated. Then the region being influenced by
highway construction was determined according to the changing of indices with different buffer distance. The results
indicate that during the period of Xianxun Highway construction, vegetation area changes are not significant in general
and the region that vegetation coverage decreased is located in both roadsides of the highway. Considering the changing
of the two indices with different buffer distance, the spatial extent for the region being influenced was up to 1000 meter
at the both sides of the highway. The findings of this study could be useful for making effective strategies for avoiding
the decrease in vegetation caused by highway constructions.
Road, as one element of the important human activities, has an influence on the land use on its two sides. With the ecological effects from the development of road network, the influence on ecological environment of roads' construction and its safety analysis have been of more and more importance. This paper, taking the example of road net in Deqin County, Deqin prefecture in the northwest of Yunnan Province and using the Landsat TM/ETM+ remote sensing images taken respectively in 1999 and 2009, discusses the influence methods and characteristics of road net on the ecological environment around, via explaining, analyzing and comparing from different angles, i.e. the change of land use type and area in this area and within 2 km buffer area of the road net.