That sounds fine.  There are several 19th century versions of this in London, where a railway line was built next to or through a park [0]. Depending on the elevation, the park may continue underneath all the viaduct arches, or just some.<p>But, rail noise is considered much less annoying than road noise (British noise pollution regulations recognise this, and allow for more rail noise before sound barriers etc are required).  I used to live on the 3rd floor overlooking a major line in London, and the students on that side of the building complained far less than the ones on the other side, overlooking a middle-sized road.<p>A highway is a different matter though.  There will be fumes from pollution, and noise and vibration from vehicles.  It&#x27;s no wonder it&#x27;s &quot;affordable housing&quot;, no-one who can afford better will want to live there.<p>Zoom out a couple of steps from [1] and decide if you&#x27;d want to live next to a highway.  Or, to a lesser extent, a railway with diesel trains, which have faint lines compared to many roads, but electric railways don&#x27;t show up at all.  (I can&#x27;t find an equivalent map for Seattle.)<p>[0] <a href="http:&#x2F;&#x2F;www.geograph.org.uk&#x2F;photo&#x2F;4062888" rel="nofollow">http:&#x2F;&#x2F;www.geograph.org.uk&#x2F;photo&#x2F;4062888</a><p>[1] <a href="http:&#x2F;&#x2F;www.londonair.org.uk&#x2F;london&#x2F;asp&#x2F;annualmaps.asp" rel="nofollow">http:&#x2F;&#x2F;www.londonair.org.uk&#x2F;london&#x2F;asp&#x2F;annualmaps.asp</a>