Earlier quoted context omitted.
Lots of them in San Diego, too. Here's an example in Clairemont, which is an early post-war suburb. Note that the homes pictured are also 'missing middle' construction. https://www.google.com/maps/@32.8276267,-117.2033566,3a,75y,... https://missingmiddlehousing.com/
My problem with this is that it is the exception and not the rule. Even this is the case; that type of service road access is only on one side of the road. This ofc doesn’t solve everything, like how crossing a super wide stroad is terrible for both cars and non-motorized users given the large number of conflict points, the long cycle times needed to move cars through fat intersections, etc.
For what it's worth, I actually lived in the pictured neighborhood, and having that simple 25-MPH max offset from the main road was so much nicer than when I lived right up next to a 35MPH road, even though the larger road was 45. It was also great to be able to walk across the street to the grocery store. The street width really wasn't an issue.