The subway line is projected to carry an estimated 46,000 to 90,000 people a day.
Los Angeles County's /*Metropolitan Transit Authority*/ has narrowed down five proposed routes.
Among the proposals are extending the Purple Line nine miles into /*Westwood*/, extending it 12 miles into /*Santa Monica*/, or extending it 17 miles to Santa Monica and /*West Hollywood*/.
There are concerns over tunneling under homes and faultlines.
The projected cost of the subway extension ranges from about $4 billion to $9 billion.
Metro is holding meetings through the end of the week.
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