What's the most polluted intersection in the Commonwealth of Massachusetts? If you guessed the entrance to the Callahan Tunnel in Boston--where countless airport travelers' cars fume, you're wrong. Not even over-traveled Harvard Square wins the title.

The losers are pedestrians and drivers who cross the Memorial Dr. and John F. Kennedy St. intersection. The thoroughfares, especially at that corner, are notorious for their frequent and lengthy stoplights.

Despite its 350th May 1 birthday, Harvard Square won't get to eat its cake until December. Square movers and shakers have decided to postpone commemorative festivities until then, when the revelers have recovered from the recent spat of public parties.

"We're all partied out," said Sally Alcorn, a member of the Harvard Square Business Association. In recent months she has had to smile through two I-stop openings, the Harvard Square Winterfest and the gala inauguration of the Charles Square Hotel and complex.

In a report reflecting on her first year in office, City Councilor Alice Wolf said one of the highlights was last fall's passage of the city's Human Rights Ordinance. But Wolf, the sponsor of the recently passed resolution granting city aid to refugees, said the year also had its disappointments.

The report leads off with a discussion of the rate of development and "what it's doing to the city," Wolf said. "There used to be much more sense of neighborhood cohesion years ago," said the 30-year Cambridge resident.

Wolf said she sees two options for the city to control development--through zoning and use of public money. She conceded however, that the city has not had much success in heeding off real estate development and its accompanying and traffic congestion.

Memories of that mammoth cavity in the middle of Harvard Square for five years are beginning to haunt residents of another Cambridge thoroughfare.

Construction of the new Central Square subway station will disrupt parts of Western Ave. and Massachusetts Ave. inevitably causing traffic rerouting and sidewalk inconveniences for Central Square patinas.

Groundbreaking ceremonies will take place this week as part of the Massachusetts Bay Transit Authority's (MBTA) continued improvement of the Red Line, Cambridge City Manager Robert W. Healy said yesterday adding that the MBTA will extend the subway platforms to accommodate six car trains.