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Accurately assessing the process of change in the ecological environment quality in this region holds significant research value. This study selected the Linzhi-to-Gongbo\u2019gyamda section of the Lhasa-to-Nyingchi Expressway as the research area. Firstly, based on the remote sensing ecological index (RSEI), this study constructed an ecological environmental quality evaluation system for the Xizang region. Subsequently, using the Google Earth Engine (GEE) platform, sub-indicators were extracted, and the combination weighting method of game theory was employed to determine indicator weights. This process resulted in the calculation of the MRSEI for the study area from 2012 to 2020. Finally, by utilizing the spatial distribution of the MRSEI, monitoring the level of MRSEI changes, and employing the transition matrix, this study analyzed the changing trend of the ecological environmental quality from 2012 to 2020. The results indicate that the MRSEI are 0.5885, 0.5951, 0.5296, 0.6202, 0.59, 0.5777, 0.5898, 0.5703, and 0.5987, showing a gradual increasing trend with an initial decrease followed by an ascent. This trend is mainly attributed to concentrated road construction and subsequent ecological restoration, leading to an improvement in the restoration effect. Simultaneously, the ecological environmental quality remains relatively stable, with 69.5% of the region showing no change, and the remaining 30.5% experiencing improvement exceeding degradation. Specifically, there were significant improvements in the land with ecological quality levels categorized as poor, fair, moderate, and good. The types of degradation primarily involved lands originally classified as excellent and good degrading to good and moderate levels, respectively. The above results serve as a theoretical reference for the ecological restoration project of the Lhasa-to-Nyingchi Expressway.<\/jats:p>","DOI":"10.3390\/rs16020265","type":"journal-article","created":{"date-parts":[[2024,1,10]],"date-time":"2024-01-10T05:47:21Z","timestamp":1704865641000},"page":"265","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Highway Ecological Environmental Assessment Based on Modified Remote Sensing Index\u2014Taking the Lhasa\u2013Nyingchi Motorway as an Example"],"prefix":"10.3390","volume":"16","author":[{"given":"Xinghan","family":"Wang","sequence":"first","affiliation":[{"name":"College of Civil Engineering, Tianjin University, Tianjin 300350, China"},{"name":"Research Center on Flood & Drought Disaster Reduction of the Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China"}]},{"given":"Qi","family":"Liu","sequence":"additional","affiliation":[{"name":"Research Center on Flood & Drought Disaster Reduction of the Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China"}]},{"given":"Pengfei","family":"Jia","sequence":"additional","affiliation":[{"name":"Citic Construction Co., Ltd., Beijing 100027, China"}]},{"given":"Xifeng","family":"Huang","sequence":"additional","affiliation":[{"name":"Shaanxi Provincial Water Resources Department, Xi\u2019an 710004, China"}]},{"given":"Jianhua","family":"Yang","sequence":"additional","affiliation":[{"name":"Academy of Eco-Civilization Development for Jing-Jin-Ji Megalopolis, Tianjin Normal University, Tianjin 300387, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2496-1757","authenticated-orcid":false,"given":"Zhengjun","family":"Mao","sequence":"additional","affiliation":[{"name":"College of Geology and Environment, Xi\u2019an University of Science and Technology, Xi\u2019an 710054, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1573-4536","authenticated-orcid":false,"given":"Shengyu","family":"Shen","sequence":"additional","affiliation":[{"name":"Department of Soil and Water Conservation, Changjiang River Scientific Research Institute (CRSRI), Wuhan 430010, China"},{"name":"Research Center on Mountain Torrent & Geologic Disaster Prevention of the Ministry of Water Resources, Wuhan 430010, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1135","DOI":"10.1007\/s11629-014-3207-x","article-title":"Characteristics of permafrost along Highway G214 in the Eastern Qinghai-Tibet Plateau","volume":"12","author":"Sheng","year":"2015","journal-title":"J. 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