Question #2: Too Close . . . For Whom??
It’s not enough to just see a map showing a home VERY close to a highway to know how exposed the home is.
You also need to need to know the nearby topography; landscaping; how the home is situated on the lot and how well-built/insulated it is; and such things as whether there is a sound barrier or berm between the highway and the adjoining residential area.
Subjective Standards; Quid Pro Quo
It’s also the case that Google or Bing maps can be off a little bit — making a big difference in how private (or not) the home’s location actually is.
While no one wants to live alongside a noisy freeway, as a veteran Realtor I’ve found that people’s sensitivity to noise is highly variable.
And plenty of Buyers are more than happy to put up with a (mild) nuisance in exchange for a robust discount off the purchase price — especially if that lets them purchase in a neighborhood that would otherwise be unaffordable.