An avenue is not a stroad; while it can have multiple lanes and less of an expectation of mixed use of the asphalt than a residential street, it's not designed for high speeds, and will often contain many speed-inhibition mechanisms (crossroads, traffic lights, curves, etc).
A good approach is to split the lanes - instead of 3+3 as in a high-speed road, they have 2+2 in the middle for thru-traffic, sandwiched by strip of sidewalk, plus another lane on each side for local traffic, and finally another sidewalk next to the buildings.
A good approach is to split the lanes - instead of 3+3 as in a high-speed road, they have 2+2 in the middle for thru-traffic, sandwiched by strip of sidewalk, plus another lane on each side for local traffic, and finally another sidewalk next to the buildings.