Starting Jan. 16, Runway 28 Left at SFO will be closed for five months in order to reconstruct taxiways used by planes. SFO says the project will improve safety, by creating "separate, non-intersecting taxiways."

From January to April, 33% of flights could be delayed by 30 to 60 minutes, SFO said. The airport did not provide an estimate on the potential delays as summer travel picks up in May and June, but said it is working with the FAA to revise schedules.