@ai6yr Fortunately Berkeley did that, although those alternate routes aren't always really close to the arterials & since those are where destinations frequently are (e.g., my library branch) sometimes it's necessary to ride a fraction of a block on a busy street to get where you're going: https://berkeleyca.gov/city-services/getting-around/walking-and-biking/bike-boulevards. Fortunately for that library, there are enough lights on the street that there are frequent gaps in the traffic so it's usually not to hard to get there from the closest cross street.
ai6yr