New York City Mayor Bill de Blasio is vowing to learn from mistakes made in response to this week�s snowstorm.

Several neighborhoods, including Manhattan�s Upper East Side, were not plowed effectively, snarling traffic.

Some areas of Staten Island still had snow-covered streets Friday, three days after the storm that left up to 11 inches of snow on the city.

De Blasio denied that Sanitation Commissioner John Doherty�s job was in jeopardy. Doherty, who also worked for ex-mayor Michael Bloomberg, is serving in an interim capacity.

De Blasio personally inspected the Upper East Side in the wake of the storm. He says he�ll do the same on Staten Island.

The mayor also says it is a coincidence that some of unplowed neighborhoods did not vote for him in November�s election.

(AP)