Brooklyn’s B44 bus carried more than 12.5 million passengers last year between the base of the Williamsburg Bridge and Sheepshead Bay, making it the city’s fifth-busiest bus route. But the B44, which runs primarily along Nostrand Avenue, is notoriously unreliable and spends less than half of each run in motion. Half the time, it’s stuck in traffic or at bus stops and red lights.

There are 300,000 residents within a quarter-mile of the bus route, and 62 percent of households in that area are car-free, according to DOT and the MTA. Since 2009, the two agencies have been working to bring Select Bus Service to the B44. Limited-stop service would be converted to SBS, while local service on the B44 would remain.

Like other SBS projects, this one will add off-board fare collection, camera-enforced dedicated bus lanes, and transit signal priority to keep buses moving with green lights. It will also include curb extensions at bus stops, also known as bus bulbs, to keep the buses from having to move in and out of traffic every time they reach a stop.

The project, which received a $28 million grant from the Federal Transit Administration, is nearing completion. Workers are painting the red bus lanes, and earlier this month, crews were spotted pouring concrete at a bus bulb near the intersection of Bedford Avenue and Fulton Street.

A presentation from last year [PDF] says the project will be complete by “late 2013,” with the more intensive reconstruction of Nostrand Avenue between Flushing and Atlantic Avenues set to wrap by fall 2014.