Advance teams began tracing the routes Gore and Jiang will follow during their visit early this week.

Secret Service agents are working closely with the speech's coordinators, Sloan said.

Cambridge Police will seal off Kirkland St. between Oxford St. and Divinity Ave. before--and for the duration of--Jiang's speech. The areas around Lowell Lecture Hall and Gund Hall will also be sealed off.

Access to those zones will be reserved for event ticket holders only, and within those areas, movement will be tightly controlled by the Secret Service and the HUPD.

With regards to Gore, "Our first goal is to be complete and our second goal is to be discreet," Sloan said.

The Kennedy School of Government will be closed from 12 p.m. to 2 p.m. on Friday for Gore's Secret Service security sweep, according to a KSG press release.

Sloan would not comment on the specifics of the Chinese President's schedule. According to previously published reports, Jiang's visit might include a campus tour. But Joe Wrinn, director of the Harvard News Office, said no such tour was planned.

Jiang's speech Saturday in Sanders Theatre is expected to draw at least several hundred protesters to the steps of Memorial Church and Widener Library in the Yard, according to protest organizers.

Protest organizers said they expect the protests against Jiang to be peaceful.

"If anything were to go beyond that, the Cambridge Police Department [CPD] would be prepared," said Lester J. Sullivan, a department sergeant.

The CPD will station additional officers throughout the city to help move traffic, which usually backs up as motorcades wind their way through the city, Sullivan said.

"Anytime you tie up streets, you could have some major traffic tie-ups," he said.

Additionally, Cambridge police officers will be available to assist HUPD officers throughout the weekend should the need arise, Sullivan said.

HUPD spokesperson Peggy A. McNamara refused to comment yesterday on increased security for Jiang's visit