Political wonks in San Francisco will have to wait until at least next week for a big showdown on the city’s affordable housing policy, which has pitted two groups of supervisors against each other.

The battle was supposed to take place Monday afternoon at the Board of Supervisors’ Land Use and Transportation Committee, with two pieces of legislation going head to head. The first, by moderate Supervisors Katy Tang, London Breed and Ahsha Safai, seeks to help middle-class families stay in a rapidly gentrifying city. The other, by progressive Supervisors Aaron Peskin and Jane Kim, seeks to build more low-income housing for the poor.

But committee members Tang, Peskin and Mark Farrell put off the discussion until next week so that negotiations between the two sides can proceed. The delay came a day after Breed tweeted photos of herself with Kim, Peskin and Safai, eating and drinking wine while they worked “to make housing better for all San Franciscans,” as Breed said in her tweet.

Meanwhile, a poll commissioned by the SoMa affordable housing developer Todco Group showed that 53 percent of respondents favored Kim and Peskin’s proposal, compared with 33 percent who supported Tang, Breed and Safai’s version. Eight percent of respondents wanted neither ordinance, and 6 percent were undecided.

— Rachel Swan

That’s a big patch job: Mayor Ed Lee kicked off national Infrastructure Week with one of the biggest pothole repair plans San Francisco has ever seen: nearly $90 million to fix the city’s bumpy roads over the next two years.

It will come out of a $530 million capital improvement budget Lee has proposed for the next two fiscal years, combining $285 million from the city’s general fund with money drawn from a $248 million road safety bond that voters approved in 2011.

Those set-asides will help fund a variety of improvements, including upgrades to the seawall at Mission Creek and Fisherman’s Wharf and repairs to sidewalks, city-owned stairways, underpasses and tunnels.

The city and bond funds will also supplement $92.2 million in developer impact fees to spruce up the parklets and plazas in booming neighborhoods like SoMa and Rincon Hill.

But potholes are the centerpiece of Lee’s infrastructure platform. Since the beginning of his term, the mayor has steadily ramped up the budget for sidewalks and roadways, enabling San Francisco’s Public Works Department to resurface more than 700 blocks a year, up from an average of 400 per year prior to the bond vote. Lee is a former city administrator and public works director.

The increase earned vigorous praise from the city Chief Resilience Officer Brian Strong, who commended Lee, in a statement issued Monday, for doing “more to improve infrastructure than any other mayor over the past 50 years.”

— Rachel Swan

Rachel Swan is a San Francisco Chronicle staff writer. Email: cityinsider@sfchronicle.com, rswan@sfchronicle.com Twitter: @sfcityinsider, @rachelswan