The city’s security plan for the Boston Marathon on Monday will include 100 surveillance cameras, a swarm of uniformed and undercover officers, and, for the first time, anti-drone technology in case of a threat from the air, officials announced Friday.
Mayor Martin Martin J. Walsh noted the resilience and spirit among residents who are rebuilding after the bombings two years ago, saying this year’s event is a test of how far the city has come. Walsh said his administration has worked to ensure the race is safe.
“We have significant resources and personnel out there to protect our public,’’ Walsh, flanked by his public safety team, said at a press conference. “The city will be the same positive environment people are used to during the Marathon.”
Police Commissioner William B. Evans said officers will take a low-key approach on Monday to ensure this year’s race goes off “without a hitch.” He said the public safety plan will resemble last year’s efforts, when the city stepped up security and the race went off successfully.
Monday will be the second time the race has been run since the 2013 Marathon terror bombings.
“We had a great plan,’’ Evans said. “It was a great day. And I’m hoping that we’ll have a successful day [this year] as well. The energy, the excitement, the weather — we couldn’t ask for a better day last year, and we expect that to happen again this year.”
Evans encouraged everyone heading to the city on race day to leave home early, whether they are heading to work, the Red Sox game at Fenway, or to the Marathon. Many of the roadways will be closed to traffic early. Newbury Street and Huntington Avenue outbound will be shut down, he said.
Vehicles will be prohibited and parking restricted on many streets throughout the weekend.
“I would urge everybody to take public transportation,’’ Evans said. “The fewer cars we have, the better off everyone’s movement around the city will be.”
Evans also urged people to leave large objects, such as backpacks, strollers, and coolers, at home. Those items will not be banned, but people toting them may be subject to a police search.
The commissioner said that the city will be using anti-droning technology for the first time in several locations to increase the public’s safety at the race. He said a company offered the services to police, who will give it a try.
“It’s just another piece of technology that is going to aid us that day,’’ Evans said.
In addition to officers keeping guard, Boston firefighters will be on patrol throughout the course of the race to keep an eye out.
The Fire Department will also stage specialized units — such as the technical rescue and hazardous materials teams — at strategic locations.
And 14 ambulances will be located along the route to support the 24 ambulances providing service coverage throughout the city.
There will be two large medical tents at the finish line, officials added.
Gina Fiandaca, the city’s transportation commissioner, also alerted the public to major traffic restrictions on Monday.
■ Streets around the Boston Common will close at 5 a.m.
■ Boylston, Hereford, and Arlington streets will close at 6 a.m.
■ All streets east of Massachusetts Avenue (as well as Exit 22 of the Massachusetts Turnpike) and all streets west of Mass. Ave. into the Kenmore Square Audubon Circle area will be closed at 8 a.m.
■ All streets in the Brighton area leading to the route will also close.
There will be a host of parking restrictions throughout the weekend, and drivers are urged to pay close attention to all posted traffic signs.
“After the Marathon is over, our crews will be there as quickly as possible to break down ... restrictions and barriers and open the city for business on Tuesday morning,’’ Fiandaca said.
Meghan E. Irons can be reached at meghan.irons@globe.com. Martin Finucane can be reached at martin.finucane@globe.com.