分享：为何不偏好高速公路旁边的房子？为何不偏好高速公路旁边的房子？ 　 最近看到一条不错的讨论： 　 https://www.reddit.com/r/AirQuality/comments/1b0peiz/air_quality_near_highway/?rdt=62129 　 In most cases, during daytime and downwind if the highway, the air is back at urban background levels at around 400 m from the centerline of the road. Things get bit more complicated during nighttime, but I'd say that's the big picture. And as always with things like this, the decay is exponential, so e.g. 150 m away from the road you have like three times lower concentrations than at 100 m from the road. I'd be happy to buy a home that was more than 300 m away from the nearest highway. Source: used to be a part of quite a few mobile studies of urban air quality and pollution gradients from highways. 这位发帖人士，应该是某个研究所或者高校的。 结论： 住家离高速建议有400m的距离 (显然，之前讨论过的Normanton P 就不符合这条）。 　该帖荣获当日十大第7，奖励楼主6分以及9华 (more...)

我还没时间去读相关文献，不过可以初断，这位兄弟不是内行 虽然那不是我研究的方向， 但也接受了博士和博后的培训 这里谈的，是空气污染，而不是声音污染 （看得见和听得着的，都比较容易察觉， 同时，噪声meter 比较普遍， 智能手机装个app 就能入门） 相比，pm2.5 and air pollution (chemical) 比较难测定