Unfortunately, it seems like nothing is being done about this. The issue was previously reported (http://seeclickfix.com/issues/1865661-hedge-blocks-sidewalk?s=nearby) and has had 11 votes. The city did respond and asked the owner to trim the hedge, but nothing has happened and they appear unwilling to enforce their own rules.

Street, Storm Drain and Sewer Manager assigned this issue to Associate Engineer

The property owner's gardener trimmed the hedges yesterday afternoon. He agreed to monitor the situation and trim the hedges as necessary.

No, the owner didn't do anything, see other reports on this same issue.

I verified the trimming of hedges by the property owner's gardener before closing the case. The trimming may not meet your expectations. After the latest trimming, the owner is concerned with potential loss of hedges. I spoke with the property owner and he agreed to meet and discuss his concerns and your expectations. Please provide some dates and times for this meeting so that we can resolve and close this case. The owner is available between 11AM and noon and 3:30 PM to 5PM.

Since this case is the same as Seeclickfix identification number 1865661, this one is being closed for consolidation purposes. For updated information, refer to case number 1865661.