After months of intense debate, the Orange County Transportation Authority seems ready to kill a proposal Monday for toll lanes on Interstate 405.

Also this week: a housing project for Costa Mesa’s homeless and a $65-million building purchase for a new OCTA headquarters.

Here is a rundown of the top local issues we’re tracking:

1. Likely Death of the 405 Toll Lanes

Transportation officials are set to officially kill the I-405 toll lanes proposal, instead opting for adding one general lane in each direction.

Meanwhile, the cities along I-405 are still calling for two general-purpose lanes in each direction.

When: Monday at 9 a.m.

Where: OCTA headquarters in Orange.

2. Homeless Housing in Costa Mesa?

A homeless supportive housing project in San Francisco.

The public is set to weigh in on which type of housing project they want to see built for between 20 and 40 homeless residents.

It’s an outgrowth of the city’s homeless task force, which called for creating a supportive housing project and a possible access center.

When: Tuesday at 4:30 p.m.

Where: Costa Mesa City Hall.

3. New Headquarters for Transit Agency?

The proposed building.

The State Compensation Insurance Fund building on East Fourth Street would be the transportation agency’s new home under a $65-million proposed deal.

When: Monday at 9 a.m.

Where: OCTA headquarters.

Other

Monday, Dec. 9

Orange County Transportation Authority Board – 9 a.m.

Tuesday, Dec. 10

Orange County Board of Supervisors – 9:30 a.m. (Changes)

Costa Mesa City Council – 4:30 p.m.

Anaheim City Council – 5 p.m.

Irvine City Council – 5 p.m.

Adam Elmahrek contributed to this report.

You can reach Nick Gerda at ngerda@gmail.com, and follow him on Twitter: @nicholasgerda.

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