Google Maps uses current and historical traffic trends to provide routes to drivers. In this paper, we use microscopic traffic simulation to quantify the improvements to both travel time and CO$_2$ emissions from Google Maps real-time navigation. A case study in Salt Lake City shows that Google Maps users are, on average, saving 1.7% of CO$_2$ emissions and 6.5% travel time. If we restrict to the users for which Google Maps finds a different route than their original route, the average savings are 3.4% of CO$_2$ emissions and 12.5% of travel time. These results are based on traffic conditions observed during the Covid-19 pandemic. As congestion gradually builds back up to pre-pandemic levels, it is expected to lead to even greater savings in emissions.
翻译：谷歌地图使用当前和历史交通趋势为司机提供路线。 在本文中,我们使用微小交通模拟来量化旅行时间和谷歌地图实时导航中二氧化碳排放量的改善。 盐湖市的案例研究显示,谷歌地图用户平均节省了1.7%的二氧化碳排放量和6.5%的旅行时间。 如果我们限制谷歌地图所找到的路线不同于其原始路线的用户,平均节省量是二氧化碳排放量的3.4%和旅行时间的12.5%。 这些结果基于Covid-19大流行期间观察到的交通条件。 随着拥堵逐渐恢复到大面积前的水平,预计会进一步节省排放量。
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