For a couple sections where there are 14′ of space for the travel lanes (too skinny for both a traffic lane and a bike lane), SDOT is looking into “advisory” bike lanes. These would basically be a dotted bike lane on the left part of the shared traffic lane suggesting that bikers ride there and alerting cars to their presence. Riders would be urged to ride in the left part of the lane because of the frequent bus stops serving the street.
Ethan Melone, Rail Transit Manager for SDOT, described them as a step up from sharrows, but a step down from a bike lane. Currently, Jackson is four lanes of traffic with few bike markings, if any.
Here’s the video overview of the Jackson configuration proposal (Note: the advisory bike lanes are not yet included).
And a concept image slideshow: