Shoppers, get out your coins and credit credits.

Parking meters could be headed to the popular Northwest Portland retail district next year under

Mayor Sam Adams is putting before the Portland City Council next week.

If approved, the plan would give Adams, who leaves office Dec. 31, major bragging rights: Efforts to control Northwest Portland parking have been in the works for more than 30 years.

"It's past time for City Council to end the parking wars in Northwest Portland," he said Friday in announcing the plan.

But Adams, who used to live in the neighborhood, would have to prevail over the objections of business owners worried that meters could drive away customers.

The plan would affect parking in an area roughly bounded by Interstate 405, the West Hills, West Burnside Street and Northwest Vaughn Street. The district, phased in over 18 months, would have zones with varying rules: Visitors would plug a meter in some areas or could park free with a time limit of 90 minutes or three hours in others.

All residents and employees of neighborhood businesses would be able to buy $60 annual parking permits. Residents could also buy one-day guest permits in $10 books of 10.

Meter readers would patrol the streets from 9 a.m. to 7 p.m. Monday through Saturday. But, unlike in downtown and the Pearl District, parking on Sundays would be free.

The new rules would replace

designed to ease traffic on Portland Timbers game nights.

The Portland Bureau of Transportation, now

, is depending on the money from the plan's parking meters, permits and tickets to balance its budget.

Installing signs and 170 meters would cost an estimated $4 million-plus, with future operations running about $2 million a year. But the program would generate a net of nearly $1.6 million a year in revenue starting in the second or third year.

In pressing his plan, Adams cites a 2011 poll of residents in Washington, Multnomah, Clackamas and Clark counties that showed 80 percent of respondents found it "difficult" or "somewhat difficult" to find parking in Northwest Portland. Adams contends that parking meters and time limits will keep motorists from parking all day, encouraging turnover that will help businesses draw customers.

But the Nob Hill Business Association, representing Northwest shops, restaurants and others, isn't convinced. The plan doesn't go far enough in addressing the need for off-street parking in the area, said association secretary Kay Wolfe. The group also wants a level playing field with competing neighborhood shopping districts, which generally don't have meters.

Adams on Friday acknowledged the group's opposition, but his office turned association representative Pat Fiedler away from Friday's news conference on the plan. Adams' spokeswoman, Caryn Brooks, said the conference wasn't a public meeting.

Ron Walters, president of the Northwest District Association neighborhood group, was invited, however. That group supports the plan. "Parking in Northwest Portland is difficult and getting worse," he said. "The status quo is not an option."

Adams said Portland would seek competitive bids from parking meter suppliers. In August, Portland's

to federal charges related to steering contracts toward Portland's biggest meter supplier.

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